110-704: The professional American football team now known as the Arizona Cardinals previously played in Chicago, Illinois , as the Chicago Cardinals from 1898 to 1959 before relocating to St. Louis, Missouri , for the 1960 through 1987 seasons. Roots can be traced to 1898, when Chris O'Brien established an amateur Chicago-based athletic team, the Morgan Athletic Club . O'Brien later moved them to Chicago's Normal Park and renamed them
220-422: A gridiron in appearance. Other major rule changes included a reduction of the field size to 110 by 53 + 1 ⁄ 3 yards (100.6 m × 48.8 m) and the adoption of a scoring system that awarded four points for a touchdown, two for a safety and a goal following a touchdown , and five for a goal from the field . Additionally, tackling below the waist was legalized, and a static line of scrimmage
330-403: A halftime period, and the first and third quarters are followed by a short break. Before the game starts, the referee and each team's captain meet at midfield for a coin toss . The visiting team can call either "heads" or "tails"; the winner of the toss chooses whether to receive or kick off the ball or which goal they wish to defend. They can defer their choice until the second half. Unless
440-401: A 10-yard-long chain between them, are used to measure for a first down. The chain crew stays on the sidelines during the game, but if requested by the officials they will briefly bring the chains on to the field to measure. A typical chain crew will have at least three people—two members of the chain crew will hold either of the two sticks, while a third will hold the down marker. The down marker,
550-657: A 10–1–2 record overall, 5–1–2 in league play. The Akron Pros were the first ever league champions; they finished with an 8–0–3 record, 6–0–3 in league play, ending their season in a scoreless tie against the Staleys. Since the Pros merely had to tie the game in order to win the title, they could afford to play not to lose. Had the Staleys not lost to the Cardinals, they would have gone into that fateful game with an 11–0–2 record, 6–0–2 in league play. As it was, it all but assured that
660-525: A PAT attempt or successful field goal, the scoring team must kick the ball off to the other team. A safety is scored when the ball carrier is tackled in the carrier's own end zone. Safeties are worth two points, which are awarded to the defense. In addition, the team that conceded the safety must kick the ball to the scoring team via a free kick . Football games are played on a rectangular field that measures 120 yards (110 m) long and 53 + 1 ⁄ 3 yards (48.8 m) wide. Lines marked along
770-510: A childhood injury, contributed to Bradley ending his NFL career after only two games—the shortest among the 13 African American players who played in the NFL before World War II. Between 1926 and 1927 a movement began among the owners of the NFL to follow the racist example of professional baseball and in 1927 every African-American player was out of the league, with the sole exception of Duke Slater. The color ban faced by Slater and other black players
880-479: A common draft that would take place each year, and it instituted an annual World Championship game to be played between the champions of each league. This championship game began play at the end of the 1966 season. Once the merger was completed, it was no longer a championship game between two leagues and reverted to the NFL championship game, which came to be known as the Super Bowl . College football maintained
990-559: A dominant team against everyone but the Cardinals in the league's early years. From 1920 to 1925, the Canton Bulldogs , champions in 1922 and 1923, beat the Bears just 2 times and no other team in the NFL defeated the Bears more than once over that entire 6-year span... except for the Cardinals. The Cardinals battled the Bears to 4–4–2 split between 1920 and 1925 and established the NFL's first rivalry. The 1925 season ended in perhaps
1100-598: A feat the Professional Football Researchers Association compared to "selling refrigerators to Eskimos ". Princeton, Harvard, Yale, and Columbia then agreed to intercollegiate play using a form of rugby union rules with a modified scoring system. These schools formed the Intercollegiate Football Association , although Yale did not join until 1879. Yale player Walter Camp , now regarded as
1210-453: A field goal instead. A group of officials, the chain crew, keeps track of both the downs and the distance measurements. On television, a yellow line is electronically superimposed on the field to show the first down line to the viewing audience. There are two categories of kicks in football: scrimmage kicks, which can be executed by the offensive team on any down from behind or on the line of scrimmage, and free kicks. The free kicks are
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#17327836324001320-428: A game between Yale and Princeton, both teams used this strategy to maintain their undefeated records. Each team held the ball, gaining no ground, for an entire half, resulting in a 0–0 tie. This "block game" proved extremely unpopular with both teams' spectators and fans. A rule change was necessary to prevent this strategy from taking hold, and a reversion to the scrum was considered. However, Camp successfully proposed
1430-598: A game for the Allegheny Athletic Association against the Pittsburgh Athletic Club . This is the first recorded instance of a player being paid to participate in a game of American football , although many athletic clubs in the 1880s offered indirect benefits, such as helping players attain employment, giving out trophies or watches that players could pawn for money, or paying double in expense money. Despite these extra benefits,
1540-533: A large stick with a dial on it, is flipped after each play to indicate the current down and is typically moved to the approximate spot of the ball. The chain crew system has been used for over 100 years and is considered an accurate measure of distance, rarely subject to criticism from either side. Football is a full-contact sport, and injuries are relatively common. Most injuries occur during training sessions, particularly ones that involve contact between players. To try to prevent injuries, players are required to wear
1650-564: A league-suggested numbering scheme. Although the sport is played almost exclusively by men, women are eligible to play in high school, college, and professional football. No woman has ever played in the NFL, but women have played in high school and college football games. In 2018, 1,100 of the 225,000 players in Pop Warner Little Scholars youth football were girls, and around 11% of the 5.5 million Americans who report playing tackle football are female according to
1760-408: A long circumference of 28 to 28 + 1 ⁄ 2 inches (71 to 72 cm), and a short circumference of 21 to 21 + 1 ⁄ 4 inches (53 to 54 cm). In college and high school play the ball has a long axis of 10 + 7 ⁄ 8 to 11 + 7 ⁄ 16 inches (27.6 to 29.1 cm), a long circumference of 27 + 3 ⁄ 4 to 28 + 1 ⁄ 2 inches (70 to 72 cm), and
1870-420: A minimum of 10 feet (3.0 m) on high school fields. Goal posts are padded at the base, and orange ribbons are normally placed at the tip of each upright as indicators of wind strength and direction. The football itself is a prolate spheroid leather ball, similar to the balls used in rugby or Australian rules football . To contain the compressed air within it, a pig's bladder was commonly used before
1980-704: A national champion of college football. The first was the Bowl Coalition , in place from 1992 to 1994. This was replaced in 1995 by the Bowl Alliance , which gave way to the Bowl Championship Series (BCS) in 1997. The BCS arrangement proved to be controversial , and was replaced in 2014 by the College Football Playoff (CFP). A football game is played between two teams of 11 players each. Playing with more on
2090-428: A pass hits the ground without a player having caught it. A forward pass can be legally attempted only if the passer is behind the line of scrimmage; only one forward pass can be attempted per down. As in rugby, players can also pass the ball backwards at any point during a play. In the NFL, a down also ends immediately if the runner's helmet comes off. The offense is given a series of four plays, known as downs . If
2200-427: A quarter ends, play continues until the down is completed. If certain fouls are committed during play while time has expired, the quarter may be extended through an untimed down . Games last longer than their defined length due to play stoppages—the average NFL game lasts slightly over three hours. Time in a football game is measured by the game clock. An operator is responsible for starting, stopping and operating
2310-470: A rematch with the Eagles , played in a heavy snowstorm that almost completely obscured the field. This was the first NFL championship to be televised. The next year, Violet Bidwill married St. Louis businessman Walter Wolfner, and the Cardinals fell to 6–5–1. The 1950s were a dismal period for the Cardinals, with records of 5–7 (1950), 3–9 (1951), 4–8 (1952), 1–10–1 (1953), 2–10 (1954), 4–7–1 (1955), 7–5 (1956;
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#17327836324002420-414: A round ball that could not be picked up or carried. It could, however, be kicked or batted with the feet, hands, head, or sides, with the objective being to advance it into the opponent's goal. Rutgers won the game 6–4. Collegiate play continued for several years with games played using the rules of the host school. Representatives of Yale, Columbia , Princeton and Rutgers met on October 19, 1873, to create
2530-422: A rule in 1882 that limited each team to three downs , or tackles, to advance the ball 5 yards (4.6 m). Failure to advance the ball the required distance within those three downs would result in control of the ball being forfeited to the other team. This change effectively made American football a separate sport from rugby, and the resulting five-yard lines added to the field to measure distances made it resemble
2640-436: A secondary signal. Women can serve as officials; Sarah Thomas became the NFL's first female official in 2015. The seven officials (of a standard seven-man crew; lower levels of play up to the college level use fewer officials) on the field are each tasked with a different set of responsibilities: Another set of officials, the chain crew , are responsible for moving the chains. The chains, consisting of two large sticks with
2750-560: A set of equipment. At a minimum players must wear a football helmet and a set of shoulder pads , but individual leagues may require additional padding such as thigh pads and guards, knee pads, chest protectors, and mouthguards . Most injuries occur in the lower extremities, particularly in the knee, but a significant number also affect the upper extremities. The most common types of injuries are strains , sprains , bruises , fractures , dislocations , and concussions . Racine Legion Too Many Requests If you report this error to
2860-410: A short circumference of 20 + 3 ⁄ 4 to 21 + 1 ⁄ 4 inches (53 to 54 cm). Football games last for a total of 60 minutes in professional and college play and are divided into two halves of 30 minutes and four quarters of 15 minutes. High school football games are 48 minutes in length with two halves of 24 minutes and four quarters of 12 minutes. The two halves are separated by
2970-456: A standard set of rules for use by all schools. Teams were set at 20 players each, and fields of 400 by 250 feet (122 m × 76 m) were specified. Harvard abstained from the conference, as they favored a rugby-style game that allowed running with the ball. After playing McGill University using both American (known as "the Boston game ") for the first game and Canadian (rugby) rules for
3080-716: A thriving professional football circuit based in the Chicago area. Teams such as the Decatur Staleys , Hammond Pros , Chicago Tigers and the Cardinals had formed an informal loop similar to, and generally on par with, the Ohio and New York circuits that had also emerged as top football centers prior to the league's founding. In 1920 , the team became a charter member of the American Professional Football Association (later renamed
3190-449: A tradition of postseason bowl games . Each bowl game was associated with a particular conference and earning a spot in a bowl game was the reward for winning a conference. This arrangement was profitable, but it tended to prevent the two top-ranked teams from meeting in a true national championship game, as they would normally be committed to the bowl games of their respective conferences. Several systems have been used since 1992 to determine
3300-567: A winning record only twice in the 20 years after their 1925 championship ( 1931 and 1935 ); including 10 straight losing seasons from 1936 to 1945 . Dr. David Jones bought the team from O'Brien in 1929 . In 1932 the team was purchased by Charles Bidwill , then a vice president of the Chicago Bears . The team has been under the ownership of the Bidwill family since then. In 1944 , owing to player shortages caused by World War II ,
3410-425: Is called on the offense. There are two main ways the offense can advance the ball: running and passing . In a typical play, the center passes the ball backwards and between their legs to the quarterback in a process known as the snap . The quarterback then either hands the ball off to a running back, throws the ball, or runs with it. The play ends when the player with the ball is tackled or goes out-of-bounds or
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3520-437: Is caught or recovered behind the line of scrimmage. If it is touched or recovered by the kicking team beyond this line, it becomes dead at the spot where it was touched. The kicking team is prohibited from interfering with the receiver's opportunity to catch the ball. The receiving team has the option of signaling for a fair catch , which prohibits the defense from blocking into or tackling the receiver. The play ends as soon as
3630-403: Is known as a two-point conversion . In general, the extra point is almost always successful, while the two-point conversion is a much riskier play with a higher probability of failure; accordingly, extra point attempts are far more common than two-point conversion attempts. A field goal (FG), worth three points, is scored when the ball is place kicked or drop kicked through the uprights and over
3740-407: Is responsible for all kicking plays. The special teams unit of the team in control of the ball tries to execute field goal (FG) attempts, punts , and kickoffs , while the opposing team's unit will aim to block or return them. Three positions are specific to the field goal and PAT (point-after-touchdown) unit: the placekicker (K or PK), holder (H), and long snapper (LS). The long snapper's job
3850-421: Is to block members of the defensive line from tackling the ball carrier on running plays or sacking the quarterback on passing plays. The leader of the offensive line is the center, who is responsible for snapping the ball to the quarterback, blocking, and for making sure that the other linemen do their jobs during the play. On either side of the center are the guards (G), while tackles (T) line up outside
3960-437: Is to snap the football to the holder, who will catch and position it for the placekicker. There is not usually a holder on kickoffs, because the ball is kicked off a tee; however, a holder may be used in certain situations, such as if wind is preventing the ball from remaining upright on the tee. The player on the receiving team who catches the ball is known as the kickoff returner (KR). The positions specific to punt plays are
4070-607: The 1958 NFL Championship game between the Baltimore Colts and the New York Giants , still referred to as the "Greatest Game Ever Played". The game, a 23–17 overtime victory by the Colts, was seen by millions of television viewers and had a major influence on the popularity of the sport. This, along with the innovations introduced by the new American Football League (AFL) in the early 1960s, helped football to become
4180-476: The 1960 season . In 1898, Chicago painting and building contractor Chris O'Brien established an amateur Chicago -based athletic club football team named the "Morgan Athletic Club". O'Brien later moved them to Chicago's Normal Park and renamed them the "Racine Normals", since Normal Park was located on Racine Avenue in Chicago. In 1901, O'Brien bought used maroon uniforms from the University of Chicago ,
4290-618: The Cardinals for second place in the league, but those losses dashed all hopes of the Bears repeating as champions. In 1923 and 1924 , the Bears got the better of the Cardinals all three times the two teams played. But in 1925 , the Bears went 0–1–1 against the Cardinals with the tie meaning the Cardinals were only a 1 ⁄ 2 game in front of the Pottsville Maroons heading into their fateful 1925 showdown. Thus, in
4400-751: The Milwaukee Badgers and the Hammond Pros . The ploy was within the NFL's rules at the time because of the open-ended schedule. Chicago finished the season with a record of 11–2–1. However, the league sanctioned them because a Chicago player, Art Folz , had hired four Chicago high school football players to play for the Milwaukee Badgers under assumed names to ensure a Cardinals victory. Meanwhile, because Pottsville had played an unauthorized exhibition game in Philadelphia against
4510-756: The National Football League (NFL) in 1922 ), for a franchise fee of $ 100. The Cardinals and the Chicago Bears (the latter founded as the Decatur Staleys before moving to Chicago in 1921 and being renamed the Chicago Staleys, then in 1922 being renamed the Chicago Bears) are the only charter members of the NFL still in existence, though the Green Bay Packers , which joined the league in 1921, existed prior to
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4620-533: The Racine Normals , then adopting the maroon color from the University of Chicago uniforms. In the 1900s the Cardinals became part of a professional circuit in Chicago. The Cardinals, along with the Chicago Bears , were founding members of the National Football League in 1920. Both teams are the only two surviving teams from that era. The Bears and the Cardinals also developed a rivalry during those NFL first years. After some irregular campaigns during
4730-462: The University of Notre Dame All-Stars, the Maroons were stripped of the title. The League decided not to award a championship for 1925. Later, it was offered to the Cardinals, whose owner, Chris O'Brien , refused to accept the championship title for his team. He argued that his team did not deserve to take the title over a team which had beaten them fairly. It was only after the Bidwill family bought
4840-411: The kickoff , which starts the first and third quarters and overtime and follows a try attempt or a successful field goal; the safety kick follows a safety. On a kickoff, the ball is placed at the 35-yard line of the kicking team in professional and college play and at the 40-yard line in high school play. The ball may be drop kicked or place kicked. If a place kick is chosen, the ball can be placed on
4950-407: The punter (P), long snapper, upback , and gunner . The long snapper snaps the football directly to the punter, who then drops and kicks it before it hits the ground. Gunners line up split outside the line and race down the field, aiming to tackle the punt returner (PR)—the player who catches the punt. Upbacks line up a short distance behind the line of scrimmage, providing additional protection to
5060-471: The "Father of American Football", secured rule changes in 1880 that reduced the size of each team from 15 to 11 players and instituted the snap to replace the chaotic and inconsistent scrum . While the game between Rutgers and Princeton is commonly considered the first American football game, several years prior in 1862, the Oneida Football Club formed as the oldest known football club in
5170-520: The "Father of American Football", established the snap , the line of scrimmage , eleven-player teams, and the concept of downs. Later rule changes legalized the forward pass , created the neutral zone , and specified the size and shape of the football. The sport is closely related to Canadian football , which evolved in parallel with and at the same time as the American game, although its rules were developed independently from those of Camp. Most of
5280-482: The 1950s, the Cardinals were largely overshadowed by the Bears in Chicago and almost fell into bankruptcy. After some efforts to buy the Cardinals, a group of investors including Lamar Hunt , Bud Adams , Bob Howsam and Max Winter , joined forces to form the American Football League to compete with National Football League. The Cardinals would later move to St. Louis, Missouri , beginning with
5390-542: The AFL New York Jets signed rookie Joe Namath to a then-record $ 437,000 contract (equivalent to $ 4.23 million in 2023). A five-year, $ 40 million NBC television contract followed, which helped to sustain the young league. The bidding war for players ended in 1966 when NFL owners approached the AFL regarding a merger, and the two leagues agreed on one that took full effect in 1970. This agreement provided for
5500-474: The Bidwills were unwilling and/or unable to pay. Needing cash, the Bidwills entertained offers from various out-of-town investors, including Lamar Hunt , Bud Adams , Bob Howsam and Max Winter . However, these negotiations came to nothing, probably because the Bidwills were only willing to sell a minority stake in the team while maintaining controlling interest. Having failed in their separate efforts to buy
5610-422: The Cardinals and Pittsburgh Steelers merged for one year and were known as the " Card-Pitt ", or derisively as the "Carpets" as they were winless that season. In 1945, the Cardinals snapped their long losing streak (an NFL record 29 games, dating back to the 1942 season and including their lone season as Card-Pitt) by beating the Bears 16–7. It was their only victory of the season. In 1946, the team finished 6–5 for
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#17327836324005720-411: The Cardinals in 1933 that the franchise began to claim the 1925 title as its own. ( For more on the controversy, see 1925 NFL Championship controversy .) The Chicago Cardinals were one of the few NFL teams to host African-American players in the 1920s—most notably Duke Slater . After the folding of the first American Football League after its lone season, Slater, against all odds, successfully joined
5830-405: The Cardinals, Hunt, Adams, Howsam and Winter joined forces to form the American Football League . Suddenly faced with a serious rival, the NFL quickly came to terms with the Bidwills, engineering a deal that sent the Cardinals to St. Louis, Missouri beginning with the 1960 season in a move which also blocked St. Louis as a potential market for the new AFL, which began play the same year. Despite
5940-489: The Chicago Bears. Slater played all 60 minutes of the contest, alternating between the offensive and defensive lines as well as participating on special teams. By the time of his retirement in 1931, Slater had achieved All-Pro status a total of six times. During his NFL career Slater never missed a game because of injury, starting in a total of 96 of the 99 games he played between the AFL and NFL. The Cardinals posted
6050-623: The Chicago Cardinals of the National Football League. Not only was Slater pro football's first African-American linemen, he was also one of the NFL's most outstanding linemen of his era. In 1928, he encouraged the team to sign Harold Bradley Sr. , who became the NFL's second black lineman. Slater and Bradley played alongside each other in the first two games of the 1928 season. A steel plate in Bradley's leg, due to
6160-582: The FCS and 85 scholarship players in the FBS, respectively. Individual players in a football game must be designated with a uniform number between 1 and 99, though some teams may "retire" certain numbers , making them unavailable to players. NFL teams are required to number their players by a league-approved numbering system, and any exceptions must be approved by the commissioner . NCAA and NFHS teams are "strongly advised" to number their offensive players according to
6270-499: The Racine Cardinals and the Decatur Staleys, making their rivalry the oldest in the NFL. They split the series, with the home team winning in each. In the Cardinals' 7–6 victory over the Staleys in their first meeting of the season, each team scored a touchdown on a fumble recovery, with the Staleys failing their extra point try. The Cardinals' defeat of the Staleys proved critical, since George Halas 's Staleys went on to
6380-456: The Sports and Fitness Industry Association. The role of the offensive unit is to advance the football down the field with the ultimate goal of scoring a touchdown . The offensive team must line up in a legal formation before they can snap the ball. An offensive formation is considered illegal if there are more than four players in the backfield or fewer than five players numbered 50–79 on
6490-518: The Staleys/Bears and Cardinals would be intense rivals. The two teams played to a tie in 1921 , when the Staleys won all but two games, thus the Cardinals came within 1 point of costing the Staleys a second consecutive championship in the league's first two years of existence. In 1922 , the Staleys, now renamed the Bears , went 9–3–0, losing to the Cardinals twice. The Bears still edged
6600-586: The United Kingdom, Ireland, New Zealand, and Australia. American football evolved from the sports of rugby and soccer . Rugby, like American football, is a sport in which two competing teams vie for control of a ball, which can be kicked through a set of goalposts or run into the opponent's goal area to score points. What is considered to be the first American football game was played on November 6, 1869 , between Rutgers and Princeton , two college teams. They consisted of 25 players per team and used
6710-468: The United States and Canada and also known as gridiron football , is a team sport played by two teams of eleven players on a rectangular field with goalposts at each end. The offense , the team with possession of the oval-shaped football , attempts to advance down the field by running with the ball or throwing it , while the defense , the team without possession of the ball, aims to stop
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#17327836324006820-455: The United States. The team consisted of graduates of Boston's elite preparatory schools and played from 1862 to 1865. The introduction of the snap resulted in an unexpected consequence. Before the snap, the strategy had been to punt if a scrum resulted in bad field position. However, a group of Princeton players realized that, as the snap was uncontested, they could now hold the ball indefinitely to prevent their opponent from scoring. In 1881, in
6930-554: The United States: official time was kept on a scoreboard clock rather than on a watch in the referee's pocket, as the NFL did; optional two-point conversions by pass or run after touchdowns; names on the jerseys of players; and several others, including expansion of the role of minority players, actively recruited by the league in contrast to the NFL. The AFL also signed several star college players who had also been drafted by NFL teams. Competition for players heated up in 1965, when
7040-460: The advent of artificial rubber inside the leather outer shell to sustain crushing forces . At all levels of play, the football is inflated to 12 + 1 ⁄ 2 to 13 + 1 ⁄ 2 psi (86 to 93 kPa), or just under one atmosphere, and weighs 14 to 15 ounces (400 to 430 g); beyond that, the exact dimensions vary slightly. In professional play the ball has a long axis of 11 to 11 + 1 ⁄ 4 inches (28 to 29 cm),
7150-435: The ball is caught, and the ball may not be advanced. Officials are responsible for enforcing game rules and monitoring the clock. All officials carry a whistle and wear black-and-white striped shirts and black hats except for the referee, whose hat is white. Each carries a weighted yellow flag that is thrown to the ground to signal that a foul has been called. An official who spots multiple fouls will throw their hat as
7260-478: The ball off, throws it, or runs with it. The primary role of the halfback, also known as the running back or tailback, is to carry the ball on running plays. Halfbacks may also serve as receivers. Fullbacks tend to be larger than halfbacks and function primarily as blockers, but they are sometimes used as runners in short-yardage or goal-line situations. They are seldom used as receivers. The offensive line (OL) consists of several players whose primary function
7370-467: The ball through the opponent's goalposts for a field goal . The team with the most points at the end of the game wins. American football evolved in the United States, originating from the sports of soccer and rugby . The first American football game was played on November 6, 1869 , between two college teams, Rutgers and Princeton , using rules based on the rules of soccer at the time. A set of rule changes drawn up from 1880 onward by Walter Camp ,
7480-416: The best year of the decade), 3–9 (1957), 2–9–1 (1958), and 2–10 (1959). With just 33 wins in ten seasons, the Cardinals were nearly forgotten in Chicago, being completely overshadowed by the Bears. Attendance at Cardinals games was sparse. With the team almost bankrupt, the Bidwills decided to cede Chicago to the Bears and move the Cardinals to another city. However, the NFL demanded a hefty relocation fee which
7590-453: The case for most professional football teams in 1918, the team was forced to suspend operations for a second time due to World War I and the outbreak of the Spanish flu pandemic . It resumed operations later in the year (one of the few teams to play that year), and has since operated continuously. At the time of the founding of the modern National Football League, the Cardinals were part of
7700-399: The colors of which had by then faded, leading O'Brien to exclaim, "That's not maroon; it's cardinal red!" It was then that the team changed its name to the "Racine Street Cardinals". The original Racine Street Cardinals team disbanded in 1906 mostly for lack of local competition. A professional team under the same name formed in 1913, claiming the previous team as part of their history. As was
7810-413: The crossbars of the defense's goalposts. In practice, almost all field goal attempts are done via place kick. While drop kicks were common in the early days of the sport, the shape of modern footballs makes it difficult to reliably drop kick the ball. The last successful scoring play by drop kick in the NFL was accomplished in 2006; prior to that, the last successful drop kick had been made in 1941. After
7920-399: The defense is to prevent the offense from scoring by tackling the ball carrier or by forcing turnovers . Turnovers include interceptions (a defender catching a forward pass intended for the offense) and forced fumbles (taking possession of the ball from the ball-carrier). The defensive line (DL) consists of defensive ends (DE) and defensive tackles (DT). Defensive ends line up on
8030-430: The defensive backfield. They are divided into two types: middle linebackers (MLB) and outside linebackers (OLB). Linebackers tend to serve as the defensive leaders and call the defensive plays, given their vantage point of the offensive backfield. Their roles include defending the run, pressuring the quarterback, and tackling backs, wide receivers, and tight ends in the passing game. The defensive backfield , often called
8140-472: The ends and sides of the field are known as the end lines and sidelines . Goal lines are marked 10 yards (9.1 m) inward from each end line. Weighted pylons are placed the sidelines on the inside corner of the intersections with the goal lines and end lines. White markings on the field identify the distance from the end zone. Inbound lines, or hash marks , are short parallel lines that mark off 1-yard (0.91 m) increments. Yard lines , which can run
8250-404: The ends of the line, while defensive tackles line up inside, between the defensive ends. The primary responsibilities of defensive ends and defensive tackles are to stop running plays on the outside and inside, respectively, to pressure the quarterback on passing plays, and to occupy the line so that the linebackers can break through. Linebackers line up behind the defensive line but in front of
8360-561: The features that distinguish American football from rugby and soccer are also present in Canadian football. The two sports are considered the primary variants of gridiron football . American football is the most popular sport in the United States in terms of broadcast viewership audience. The most popular forms of the game are professional and college football , with the other major levels being high-school and youth football. As of 2022 , nearly 1.04 million high-school athletes play
8470-468: The field is punishable by a penalty. Teams may substitute any number of their players between downs; this "platoon" system replaced the original system, which featured limited substitution rules, and has resulted in teams utilizing specialized offensive, defensive and special teams units. The number of players allowed on an active roster varies by league; the NFL has a 53-man roster, while NCAA Division I allows teams to have 63 scholarship players in
8580-454: The field was shortened to 100 yards (91 m) long, two 10-yard-long (9.1 m) end zones were created, and teams were given four downs instead of three to advance the ball 10 yards (9.1 m). The roughing the passer penalty was implemented in 1914, and eligible players were first allowed to catch the ball anywhere on the field in 1918. On November 12, 1892, Pudge Heffelfinger was paid $ 500 (equivalent to $ 16,956 in 2023) to play
8690-484: The first six years of the NFL's existence, the Bears-Cardinals games had a direct impact on the league championship 4 times. The Bears and Cardinals each took home 1 title during that span. But the Bears nearly cost the Cardinals their title, the Cardinals nearly cost the Bears their title, and had it not been for the Cardinals' tenacity against the Bears, the Bears very well might have won two more. The Bears were
8800-439: The first winning season in eight years. In 1947, the NFL standardized on a 12-game season. This would be the most celebrated year in Cardinals history as the team went 9–3, beating Philadelphia in the championship game 28–21 with their " Million Dollar Backfield ", which included quarterback Paul Christman , halfback Charley Trippi , halfback Elmer Angsman , and fullback Pat Harder , piling up 282 rushing yards. However, Bidwill
8910-629: The formation of the Intercollegiate Athletic Association of the United States, later renamed the National Collegiate Athletic Association (NCAA). The legal forward pass was introduced in 1906, although its effect was initially minimal due to the restrictions placed on its use. The idea of a 40-yard-wider field was opposed by Harvard due to the size of the new Harvard Stadium . Other rule changes introduced that year included
9020-520: The formation of the NFL. The person keeping the minutes of the first league meeting, unfamiliar with the nuances of Chicago football, recorded the Cardinals as from Racine, Wisconsin . The team was renamed the "Chicago Cardinals" in 1922 after a team actually from Racine, Wisconsin (the Horlick-Racine Legion ) entered the league. That season the team moved to Comiskey Park . The Staleys and Cardinals played each other twice in 1920 as
9130-419: The game clock based on the direction of the appropriate official . A separate play clock is used to show the amount of time within which the offense must initiate a play. The play clock is set to 25 seconds after certain administrative stoppages in play and to 40 seconds when play is proceeding without such stoppages. If the offense fails to start a play before the play clock reads "00", a delay of game foul
9240-409: The game had a strict sense of amateurism at the time, and direct payment to players was frowned upon, if not prohibited outright. Over time, professional play became increasingly common, and with it came rising salaries and unpredictable player movement, as well as the illegal payment of college players who were still in school. The National Football League (NFL), a group of professional teams that
9350-416: The greatest controversy in professional football history. In those days, there was no fixed schedule nor any playoff games. The championship was decided by winning percentage. At season's end, after losing in a Chicago snow storm to the Pottsville Maroons 21–7, the Cardinals found themselves in second place. Hoping to improve their record, they scheduled and won two hastily arranged games against weaker teams,
9460-443: The ground or a tee; a holder may be used in either case. On a safety kick, the kicking team kicks the ball from their own 20-yard line. They can punt, drop kick or place kick the ball, but a tee may not be used in professional play. Any member of the receiving team may catch or advance the ball. The ball may be recovered by the kicking team once it has gone at least ten yards and has touched the ground or has been touched by any member of
9570-434: The guards. The principal receivers are the wide receivers (WR) and the tight ends (TE). Wide receivers line up on or near the line of scrimmage, split outside the line. The main goal of the wide receiver is to catch passes thrown by the quarterback, but they may also function as decoys or as blockers during running plays. Tight ends line up outside the tackles and function both as receivers and as blockers. The role of
9680-506: The most popular sport in the United States by the mid-1960s. The rival AFL arose in 1960 and challenged the NFL's dominance. The AFL began in relative obscurity but eventually thrived, with an initial television contract with the ABC television network. The AFL's existence forced the conservative NFL to expand to Dallas and Minnesota in an attempt to destroy the new league. Meanwhile, the AFL introduced many new features to professional football in
9790-429: The offense advances ten or more yards in the four downs, they are awarded a new set of four downs. If they fail to advance ten yards, possession of the football is turned over to the defense. In most situations, if the offense reaches their fourth down they will punt the ball to the other team, which forces them to begin their drive from farther down the field; if they are in field goal range , they might attempt to score
9900-410: The offense's advance and to take control of the ball for themselves. The offense must advance the ball at least ten yards in four downs or plays; if they fail, they turn over the football to the defense, but if they succeed, they are given a new set of four downs to continue the drive . Points are scored primarily by advancing the ball into the opposing team's end zone for a touchdown or kicking
10010-429: The offensive line. Players can line up temporarily in a position whose eligibility is different from what their number permits as long as they report the change immediately to the referee, who then informs the defensive team of the change. Neither team's players, except the center (C), are allowed to line up in or cross the neutral zone until the ball is snapped. Interior offensive linemen are not allowed to move until
10120-445: The plane of the two end lines. The crossbar of these posts is 10 feet (3.0 m) above the ground, with vertical uprights at the end of the crossbar 18 feet 6 inches (5.64 m) apart for professional and collegiate play, and 23 feet 4 inches (7.11 m) apart for high school play. The uprights extend vertically 35 feet (11 m) on professional fields, a minimum of 10 yards (9.1 m) on college fields, and
10230-451: The point(s)-after-touchdown (PAT) or conversion, which is a single scoring opportunity. This is generally attempted from the two- or three-yard line, depending on the level of play. If the PAT is scored by a place kick or drop kick through the goal posts, it is worth one point, typically called the extra point. If the PAT is scored by what would normally be a touchdown, it is worth two points; this
10340-527: The presence of a baseball team already named the St. Louis Cardinals , the football team kept its name upon relocation there, and would be referred to as " the football Cardinals " until it departed for Arizona following the 1987 season . italics = played a portion of career with the Cardinals and enshrined representing another team Notes: †= Never played in the league American football American football , referred to simply as football in
10450-422: The punter. In football, the winner is the team that has scored more points at the end of the game. There are multiple ways to score in a football game. The touchdown (TD), worth six points, is the most valuable scoring play in American football. A touchdown is scored when a live ball is advanced into, caught, or recovered in the opposing team's end zone. The scoring team then attempts a try, more commonly known as
10560-401: The receiving team. The three types of scrimmage kicks are place kicks, drop kicks, and punts. Only place kicks and drop kicks can score points. The place kick is the standard method used to score points, because the pointy shape of the football makes it difficult to reliably drop kick. Once the ball has been kicked from a scrimmage kick, it can be advanced by the kicking team only if it
10670-439: The reduction of playing time from 70 to 60 minutes and an increase of the distance required for a first down from 5 to 10 yards (4.6 to 9.1 m). To reduce infighting and dirty play between teams, the neutral zone was created along the width of the football before the snap. Scoring was also adjusted: points awarded for field goals were reduced to three in 1909 and points for touchdowns were raised to six in 1912. Also in 1912,
10780-542: The rulebook for the 1876 college football season , when the sport first shifted from soccer-style rules to rugby-style rules. Although it could easily have been called "rugby" at this point, Harvard, one of the primary proponents of the rugby-style game, compromised and did not request the name of the sport be changed to "rugby". The terms " gridiron " or "American football" are favored in English-speaking countries where other types of football are popular, such as
10890-457: The second one, the Harvard players preferred the Canadian style of having only 11 men on the field, running the ball without having to be chased by an opponent, the forward pass, tackling, and using an oblong instead of a round ball. An 1875 Harvard–Yale game played under rugby-style rules was observed by two Princeton athletes who were impressed by it. They introduced the sport to Princeton,
11000-503: The secondary, consists of cornerbacks (CB) and safeties (S). Safeties are themselves divided into free safeties (FS) and strong safeties (SS). Cornerbacks line up outside the defensive formation, typically opposite a receiver to be able to cover them. Safeties line up between the cornerbacks but farther back in the secondary. Safeties tend to be viewed as "the last line of defense" and are responsible for stopping deep passing plays as well as breakout running plays. The special teams unit
11110-411: The snap of the ball. The main backfield positions are the quarterback (QB), halfback/tailback (HB/TB), and fullback (FB). The quarterback is the leader of the offense. Either the quarterback or a coach calls the plays. Quarterbacks typically inform the rest of the offense of the play in the huddle before the team lines up. The quarterback lines up behind the center to take the snap and then hands
11220-531: The sport in the U.S., with another 81,000 college athletes in the NCAA and the NAIA . The National Football League (NFL) has the highest average attendance of any professional sports league in the world . Its championship game, the Super Bowl , ranks among the most-watched club sporting events globally. In 2022, the league had an annual revenue of around $ 18.6 billion, making it the most valuable sports league in
11330-431: The time was played at the collegiate level . The upstart NFL received a boost to its legitimacy in 1925, however, when an NFL team, the Pottsville Maroons , defeated a team of Notre Dame all-stars in an exhibition game . A greater emphasis on the passing game helped professional football to distinguish itself further from the college game during the late 1930s. Football, in general, became increasingly popular following
11440-411: The width of the field, are marked every 5 yards (4.6 m). A one-yard-wide line is placed at each end of the field; this line is marked at the center of the two-yard line in professional play and at the three-yard line in college play. Numerals that display the distance from the closest goal line in yards are placed on both sides of the field every ten yards. Goalposts are located at the center of
11550-408: The winning team decides to defer, the losing team chooses the option the winning team did not select—to receive, kick, or select a goal to defend to begin the second half. Most teams choose to receive or defer, because choosing to kick the ball to start the game allows the other team to choose which goal to defend. Teams switch goals following the first and third quarters. If a down is in progress when
11660-402: The world. Other professional and amateur leagues exist worldwide, but the sport does not have the international popularity of other American sports like baseball or basketball ; the sport maintains a growing following in the rest of North America, Europe, Brazil, and Japan. In the United States, American football is referred to as "football". The term "football" was officially established in
11770-520: Was instituted. Despite these new rules, football remained a violent sport. Dangerous mass-formations like the flying wedge resulted in serious injuries and deaths. A 1905 peak of 19 fatalities nationwide resulted in a threat by President Theodore Roosevelt to abolish the game unless major changes were made. In response, 62 colleges and universities met in New York City to discuss rule changes on December 28, 1905. These proceedings resulted in
11880-494: Was not around to see it; he had died before the start of the season, leaving the team to his wife Violet . Prior to the season he had beaten the Chicago Rockets of the upstart All-America Football Conference for the rights to Trippi. This signing is generally acknowledged as the final piece in the championship puzzle. The next season saw the Cardinals finish 11–1 and again play in the championship game, but lost 7–0 in
11990-401: Was not ironclad, however, and four other African-American players managed to draw salaries in the NFL during short careers interspersed from 1928 through 1933. Slater was once again the only black player in the league in 1929. On November 28, 1929, Slater participated in an NFL record as a lineman in front of Ernie Nevers in a game in which he scored six rushing touchdowns in a 40–6 victory over
12100-434: Was originally established in 1920 as the American Professional Football Association, aimed to solve these problems. This new league's stated goals included an end to bidding wars over players, prevention of the use of college players, and abolition of the practice of paying players to leave another team. By 1922, the NFL had established itself as America's premier professional football league. The dominant form of football at
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