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83-619: Every Major League Baseball (MLB) season, one American League (AL) team wins the pennant , signifying that they are the league's champion and have the right to play in the World Series against the champion of the National League (NL). The pennant was presented to the team with the best win–loss record each year through the 1968 season, after which the AL Championship Series (ALCS) was introduced to decide
166-588: A minor league known as the Western League , which existed from 1885 to 1899 with teams in mostly Great Lakes states, the league changed its name to the American League for the 1900 season and the next year developed into a second major league as a competitor to the older National League . This was prompted by the NL dropping four teams following the 1899 season after having absorbed its previous rival,
249-530: A 2006–07 investigation produced the Mitchell Report , which found that many players had used steroids and other performance-enhancing substances , including at least one player from each team. Each team plays 162 games per season, with Opening Day traditionally held during the first week of April. Six teams in each league then advance to a four-round postseason tournament in October, culminating in
332-667: A batter could foul off any number of pitches with no strikes counted against him; this gave an enormous advantage to the batter. After the 1919 World Series between the Chicago White Sox and Cincinnati Reds, baseball was rocked by allegations of a game-fixing scheme known as the Black Sox Scandal . Eight players— "Shoeless" Joe Jackson , Eddie Cicotte , Claude "Lefty" Williams , George "Buck" Weaver , Arnold "Chick" Gandil , Fred McMullin , Charles "Swede" Risberg , and Oscar "Happy" Felsch —intentionally lost
415-663: A best-of-five playoff to determine the opponents who will play in the ALCS. AL pennant winners have gone on to win the World Series 68 times, most recently in 2023. The New York Yankees have won 41 AL pennants, winning their first in 1921 and their most recent in 2024. This total is more than twice that of the next-closest team, the Oakland Athletics , who have won 15. They are followed by the Boston Red Sox and
498-406: A chance for recreation and for taking their minds off their work even more than before." With the approval of President Roosevelt, spring training began in 1942 with few repercussions. The war interrupted the careers of stars including Stan Musial , Bob Feller , Ted Williams , and Joe DiMaggio , but baseball clubs continued to field their teams. Branch Rickey, president and general manager of
581-506: A grand jury in Pittsburgh related to cocaine trafficking. The 1994–95 Major League Baseball strike from August 12, 1994, to April 25, 1995, caused the cancellation of over 900 games and the forfeit of the entire 1994 postseason. Routinely in the late 1990s and early 2000s, baseball players hit 40 or 50 home runs in a season, a feat that was considered rare even in the 1980s. It later became apparent that at least some of this power surge
664-591: A little better in subsequent campaigns—but in their eighth season (1969) the Mets became the first of the 1960s expansion teams to play in the postseason, culminating in a World Series title over the heavily favored Baltimore Orioles. In 1966, the major leagues moved to the "Deep South" when the Braves moved to Atlanta. In 1968, the Kansas City Athletics moved west to become the Oakland Athletics . In 1969,
747-606: A man for many reasons. Color is not one of them." That year, Robinson won the inaugural Major League Baseball Rookie of the Year Award (separate NL and AL Rookie of the Year honors were not awarded until 1949). Less than three months later, Larry Doby became the first African-American to break the color barrier in the American League with the Cleveland Indians. The next year, a number of other black players entered
830-413: A new National Agreement which tied independent contracts to the reserve-clause contracts. The agreement also set up a formal classification system for minor leagues, the forerunner of today's system that was refined by Branch Rickey . Several other early defunct baseball leagues are considered major leagues, and their statistics and records are included with those of the two modern major leagues. In 1969,
913-431: A one-armed outfielder, got the chance to advance to the major leagues. However, MLB rosters did not include any black players through the end of the war. Black players, many of whom served in the war, were still restricted to playing Negro league baseball . Wartime blackout restrictions , designed to keep outdoor lighting at low levels, caused another problem for baseball. These rules limited traveling and night games to
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#1732773360509996-506: A postseason playoff series for the pennant and the right to play in the World Series. Until the late 1970s, league umpires working behind home plate wore large, balloon-style chest protectors worn outside the shirt or coat, while their colleagues in the National League wore chest protectors inside the shirt or coat. In 1977, new umpires (including Steve Palermo ) had to wear the inside chest protector, although those on staff wearing
1079-501: A rebellion by players against the hated "reserve clause", which restricted the free movement of players between clubs. Teams came and went; 1882 was the first season where the league's membership was the same as the preceding season's, and only four franchises survived to see 1900. Competitor leagues formed regularly and also disbanded regularly. The most successful was the American Association (1882–1891), sometimes called
1162-451: A single league, divided into two parts, also called leagues. This change in legal status had no effect on play, scheduling, and so forth. There were eight charter teams in 1901, the league's first year as a major league, and the next year the original Milwaukee Brewers (not to be confused with the current Milwaukee Brewers ) moved to St. Louis to become the St. Louis Browns , and the year after
1245-543: A single-game MLB attendance record in their first home appearance with 78,672 fans. In 1961, the first Washington Senators franchise moved to Minneapolis–St. Paul to become the Minnesota Twins . Two new teams were added to the American League at the same time: the Los Angeles Angels (who soon moved from downtown L.A. to nearby Anaheim ) and a new Washington Senators franchise. The NL added
1328-492: A successful Baltimore chop, the batter hits the ball forcefully into the ground, causing it to bounce so high that the batter reaches first base before the ball can be fielded and thrown to the first baseman. The adoption of the foul strike rule—in the NL in 1901, in the AL two years later—quickly sent baseball from a high-scoring game to one where scoring runs became a struggle. Before this rule, foul balls were not counted as strikes:
1411-830: A third round to the playoffs in the form of the American League Division Series , with the best second-place team advancing to the playoffs as a wild-card team, in addition to the three divisional champions. In 1998, the newly franchised Tampa Bay Devil Rays joined the league, and the Arizona Diamondbacks joined the National League: i.e., each league added a fifteenth team. An odd number of teams per league meant that at least one team in each league would have to be idle on any given day, or alternatively, that odd team out would have had to play an interleague game against its counterpart in
1494-679: Is at the intersection of North Dr. Martin Luther King Jr. Drive and West Kilbourn Avenue where the hotel once stood. In March 1904, Johnson moved the league's headquarters from Chicago to New York. Babe Ruth , noted as one of the most prolific hitters in Major League Baseball history, spent the majority of his career in the American League with the Boston Red Sox and the New York Yankees . From 1973 to 2022 The American League had one notable difference versus
1577-639: Is headquartered in Midtown Manhattan . Baseball's first all-professional team, the Cincinnati Red Stockings , was founded in 1869. The first few decades of professional baseball saw rivalries between leagues, and players often jumped from one team or league to another. These practices were essentially ended by the National Agreement of 1903, in which AL and NL agreed to respect each other's player contracts, including
1660-484: The American Association , which disbanded in 1891 after ten seasons. In its early history of the late 1880s, the minor Western League struggled until 1894, when Ban Johnson became the president of the league. Johnson pushed the league to rise to major league status, after the name change to the American League was decided in a league meeting in Milwaukee, Wisconsin , at the former Republican Hotel. A historical marker
1743-649: The American League ( AL ), is the younger of two leagues constituting Major League Baseball (MLB) in the United States and Canada . It developed from the Western League , a minor league based in the Great Lakes states , which eventually aspired to major league status. It is sometimes called the Junior Circuit because it claimed Major League status for the 1901 season, 25 years after
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#17327733605091826-519: The American League (AL), with 29 in the United States and 1 in Canada. Formed in 1876 and 1901, respectively, the NL and AL cemented their cooperation with the National Agreement in 1903, making MLB the oldest major professional sports league in the world. They remained legally separate entities until 2000, when they merged into a single organization led by the commissioner of baseball . MLB
1909-852: The Boston Braves became the Milwaukee Braves , the St. Louis Browns became the Baltimore Orioles , and the Philadelphia Athletics became the Kansas City Athletics . The 1958 Major League Baseball season began to turn Major League Baseball into a nationwide league. Walter O'Malley , owner of the Brooklyn Dodgers and "perhaps the most influential owner of baseball's early expansion era," moved his team to Los Angeles, marking
1992-520: The Detroit Tigers , with 14 and 11 pennants won respectively. The Yankees have the most pennants since the introduction of the ALCS in 1969 with 11, followed by the Athletics, Red Sox, and the Baltimore Orioles with 6, 6, and 5 respectively. The Yankees also hold the record for most wins by a pennant-winning team, with their 1998 team winning 114 out of 162 games, finishing 22 games ahead of
2075-596: The Great Depression , baseball's popularity had begun a downward turn in the early 1930s. By 1932, only two MLB teams turned a profit. Attendance had fallen, due at least in part to a 10% federal amusement tax added to baseball ticket prices. Baseball owners cut their rosters from 25 men to 23, and even the best players took pay cuts. Team executives were innovative in their attempts to survive, creating night games, broadcasting games live by radio, and rolling out promotions such as free admission for women. Throughout
2158-682: The Houston Astros and the New York Mets in 1962. The Astros (known as the "Colt .45s" during their first three seasons) became the first southern major league franchise since the Louisville Colonels folded in 1899 and the first franchise to be located along the Gulf Coast . The Mets established a reputation for futility by going 40–120 during their first season of play in the nation's media capital—and by playing only
2241-611: The National Association of Base Ball Players (NABBP). The NABBP existed as an amateur league for 12 years. By 1867, more than 400 clubs were members. Most of the strongest clubs remained those based in the Northeastern United States. For professional baseball 's founding year, MLB uses the year 1869—when the first professional team, the Cincinnati Red Stockings , was established. A schism developed between professional and amateur ballplayers after
2324-487: The National Basketball Association (NBA). Baseball games are broadcast on television, radio, and the internet throughout North America and in several other countries. MLB has the highest total season attendance of any sports league in the world; in 2023, it drew more than 70.75 million spectators. MLB also oversees Minor League Baseball , which comprises lower-tier teams affiliated with
2407-689: The New York Highlanders replaced the disbanded original Baltimore Orioles. Those eight franchises constituted the league for 52 seasons until the Browns moved to Baltimore and took up the Orioles name. The eight original teams and their counterparts in the "Classic Eight" were: Following the 1999 season, the American and National Leagues were merged with Major League Baseball, and the leagues ceased to exist as business entities. The position of
2490-621: The Texas Rangers . In 1977, baseball expanded again , adding a second Canadian team, the Toronto Blue Jays , as well as the Seattle Mariners . Subsequently, no new teams were added until the 1990s and no teams moved until 2005. By the late 1960s, the balance between pitching and hitting had swung in favor of the pitchers. In 1968—later nicknamed "the year of the pitcher" —Boston Red Sox player Carl Yastrzemski won
2573-568: The World Series , a best-of-seven championship series between the two league champions first played in 1903. The New York Yankees have the most championships with 27. The reigning champions are the Los Angeles Dodgers , who defeated the New York Yankees in the 2024 World Series . MLB is the third-wealthiest professional sports league by revenue in the world after the National Football League (NFL) and
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2656-817: The first and second Negro National Leagues (1920–1931 and 1933–1948), the Eastern Colored League (1923–1928), the American Negro League (1929), the East–West League (1932), the Negro Southern League (1932), and the Negro American League (1937–1948). In 2021, baseball reference website Baseball-Reference.com began to include statistics from those seven leagues into their major-league statistics. In May 2024, Major League Baseball announced that it
2739-442: The "beer and whiskey league" for its tolerance of the sale of alcoholic beverages to spectators. For several years, the NL and American Association champions met in a postseason championship series—the first attempt at a World Series . The two leagues merged in 1892 as a single 12-team NL, but the NL dropped four teams after the 1899 season. This led to the formation of the American League in 1901 under AL president Ban Johnson , and
2822-420: The 120 World Series played since 1903. The New York Yankees have won 27 World Series and 41 American League titles, the most in major league history. The Philadelphia/Kansas City/Oakland Athletics have won the second most AL titles with 15, followed by the Boston Red Sox with 14. For decades, Major League baseball clubs only played teams from their own league during the regular season and playoffs, with only
2905-476: The 1870s. In 1876, the National League of Professional Base Ball Clubs (later known as the National League or NL) was established after the NA proved ineffective. The league placed its emphasis on clubs rather than on players. Clubs could now enforce player contracts, preventing players from jumping to higher-paying clubs. Clubs were required to play the full schedule of games instead of forfeiting scheduled games when
2988-557: The 1960s and 1970s, as baseball expanded, NFL football had been surging in popularity, making it economical for many of these cities to build multi-purpose stadiums instead of single-purpose baseball fields. Because of climate and economic issues, many of these facilities had playing surfaces made from artificial turf , as well as the oval designs characteristic of stadiums designed to house both baseball and football. This often resulted in baseball fields with relatively more foul territory than older stadiums. These characteristics changed
3071-463: The 1990s. During the 1980s, baseball experienced a number of significant changes the game had not seen in years. Home runs were on the decline throughout the decade, with players hitting 40 home runs just 13 times and no one hitting more than 50 home runs in a season for the first time since the Dead-ball era (1900–1919). The 1981 Major League Baseball strike from June 12 until July 31 forced
3154-409: The 2022 season, when the universal DH rule was implemented. In 2023, American League teams played 46 regular season interleague games against all 15 National League teams, 23 at home and 23 on the road. In 2000, the American League ended its status as a legally independent entity when the American and National Leagues were both merged into the legal entity Major League Baseball (MLB). This left MLB as
3237-491: The American League batting title with an average of just .301, the lowest in the history of Major League Baseball. Detroit Tigers pitcher Denny McLain won 31 games, making him the only pitcher to win 30 games in a season since Dizzy Dean in 1934. St. Louis Cardinals starting pitcher Bob Gibson achieved an equally remarkable feat by allowing an ERA of just 1.12. Following these pitching performances, in December 1968
3320-861: The American and National Leagues both added two expansion franchises . The American League added the Seattle Pilots (who became the Milwaukee Brewers after one disastrous season in Seattle) and the Kansas City Royals . The NL added the first Canadian franchise, the Montreal Expos , as well as the San Diego Padres . In 1972, the second Washington Senators moved to the Dallas–Fort Worth metroplex to become
3403-533: The Boston Red Sox. The 1954 Cleveland Indians won the most games of any pennant winner under the pre-1969 system, winning 111 out of their 154 games and finishing eight games ahead of the Yankees. The Milwaukee Brewers won the AL pennant in 1982 but later moved to the NL starting in the 1998 season. The only current MLB franchise to have never won a league pennant—and therefore, to have never appeared in
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3486-476: The Brooklyn Dodgers, began making efforts to introduce a black baseball player to the previously all-white professional baseball leagues in the mid-1940s. He selected Jackie Robinson from a list of promising Negro league players. After obtaining a commitment from Robinson to "turn the other cheek" to any racial antagonism directed at him, Rickey agreed to sign him to a contract for $ 600 a month. In what
3569-818: The Dodgers when they came to town, abandoning the Negro league teams that they had followed exclusively. Robinson's promotion met a generally positive, although mixed, reception among newspaper writers and white major league players. Manager Leo Durocher informed his team, "I don't care if he is yellow or black or has stripes like a fucking zebra. I'm his manager and I say he plays." After a strike threat by some players, NL President Ford C. Frick and Baseball Commissioner Happy Chandler let it be known that any striking players would be suspended. Robinson received significant encouragement from several major-league players, including Dodgers teammate Pee Wee Reese who said, "You can hate
3652-683: The Great Depression, no MLB teams moved or folded. The onset of World War II created a shortage of professional baseball players, as more than 500 men left MLB teams to serve in the military. Many of them played on service baseball teams that entertained military personnel in the US or in the Pacific. MLB teams of this time largely consisted of young men, older players, and those with a military classification of 4F , indicating mental, physical, or moral unsuitability for service. Men like Pete Gray ,
3735-496: The MLB Playing Rules Committee voted to reduce the strike zone from knees to shoulders to top of knees to armpits and lower the pitcher's mound from 15 to 10 inches, beginning in the 1969 season. In 1973, the American League, which had been suffering from much lower attendance than the National League, sought to increase scoring even further by initiating the designated hitter (DH) rule. Throughout
3818-939: The NL Central. At the same time, the Detroit Tigers were moved from the AL East to the AL Central, making room for the Devil Rays in the East. Even after expansion, the American League then continued with 14 teams. This situation changed again in 2013 when the Houston Astros moved from the National League Central division to the American League West. The Astros had been in the NL for 51 years since beginning as an expansion team in 1962. Since their move, both leagues now consist of 15 teams. For
3901-770: The Special Baseball Records Committee of Major League Baseball officially recognized six major leagues: the National League, American League, American Association, Union Association (1884), Players' League (1890), and Federal League (1914–1915). The status of the National Association as a major league has been a point of dispute among baseball researchers; while its statistics are not recognized by Major League Baseball, its statistics are included with those of other major leagues by some baseball reference websites, such as Retrosheet . Some researchers, including Nate Silver , dispute
3984-486: The World Series in exchange for a ring worth $ 100,000 ($ 1,712,780.35 in 2022 dollars). Despite being acquitted, all were permanently banned from Major League Baseball. Baseball's popularity increased in the 1920s and 1930s. The 1920 season was notable for the death of Ray Chapman of the Cleveland Indians . Chapman, who was struck in the head by a pitch and died a few hours later, became the only MLB player to die of an on-field injury. Both leagues quickly began to require
4067-405: The World Series—is the Seattle Mariners . Major League Baseball Major League Baseball ( MLB ) is a professional baseball league and the highest level of organized baseball in the United States and Canada . One of the "Big Four" major professional sports leagues in the United States and Canada , MLB comprises 30 teams, divided equally between the National League (NL) and
4150-402: The best records in each division played one another in the five-game ALCS to determine the pennant winner, who received (and continues to receive) the William Harridge Trophy . The trophy featured a golden eagle, the league's emblem, sitting atop a silver baseball and clutching the AL banner. Since 2017 , the trophy is all silver with a pennant on top. The trophy is named for Will Harridge , who
4233-474: The cancellation of 713 total games and resulted in a split-season format. In 1985, Pete Rose broke Ty Cobb 's all-time hits record with his 4,192nd hit, and in 1989 Rose received a lifetime ban from baseball as a result of betting on baseball games while manager of the Cincinnati Reds . Rose was the first person to receive a lifetime ban from baseball since 1943. 1985 also saw the Pittsburgh drug trials which involved players who were called to testify before
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#17327733605094316-403: The center field fence, and the Huntington Avenue Grounds of the Boston Red Sox , which was 635 feet (194 m) to the center field fence, thus home runs were rare, and "small ball" tactics such as singles , bunts , stolen bases , and the hit-and-run play dominated the strategies of the time. Hitting methods like the Baltimore chop were used to increase the number of infield singles. On
4399-443: The club was no longer in the running for the league championship, which happened frequently under the NA. A concerted effort was made to curb gambling on games, which was leaving the validity of results in doubt. The first game in the NL—on Saturday, April 22, 1876 (at Jefferson Street Grounds in Philadelphia )—is often pointed to as the beginning of MLB. The early years of the NL were tumultuous, with threats from rival leagues and
4482-573: The condition of the baseball itself. The baseball used American rather than the modern Australian wool yarn and was not wound as tightly, affecting the distance that it would travel. More significantly, balls were kept in play until they were mangled, soft and sometimes lopsided. During this era, a baseball cost three dollars, equal to $ 52.72 today (in inflation-adjusted USD ), and owners were reluctant to purchase new balls. Fans were expected to throw back fouls and (rare) home runs. Baseballs also became stained with tobacco juice, grass, and mud, and sometimes
4565-432: The contentious reserve clause . The period before 1920 was the dead-ball era , when home runs were rarely hit. Professional baseball was rocked by the Black Sox Scandal , a conspiracy to fix the 1919 World Series . Baseball survived the scandal, albeit with major changes in its governance as the relatively weak National Commission was replaced with a powerful commissioner of baseball with near-unlimited authority over
4648-546: The difference in play between the two major leagues has diminished considerably. Though both leagues agreed to be jointly governed by a commissioner in 1920, they remained separate business entities with their own presidents and management. This was the case until after the 1999 season, when the American League legally merged with the National League under the auspices of Major League Baseball, which now operates much like other North American professional sports leagues, albeit with two "leagues" instead of "conferences". Originally
4731-399: The first 96 years, American League teams faced their National League counterparts only in exhibition games or in the World Series. Beginning in 1997, interleague games have been played during the regular season and count in the standings. As part of the agreement instituting interleague play, the designated-hitter rule was used only in games where the American League team is the home team, until
4814-404: The first major league franchise on the West Coast. O'Malley also helped persuade the rival New York Giants to move west to become the San Francisco Giants. Giants owner Horace Stoneham had been contemplating a move to Minnesota amid slumping attendance at the aging Polo Grounds ballpark when O'Malley invited him to meet San Francisco Mayor George Christopher in New York. After Stoneham
4897-414: The formation of the National League (the "Senior Circuit"). Since 1903, the American League champion has played in the World Series against the National League champion with only two exceptions: 1904, when the NL champion New York Giants refused to play their AL counterpart, and 1994, when a players' strike resulted in the cancellation of the Series. Through 2024, American League teams have won 68 of
4980-454: The founding of the Cincinnati club. The NABBP split into an amateur organization and a professional organization. The National Association of Professional Base Ball Players , often known as the National Association (NA), was formed in 1871. Its amateur counterpart disappeared after only a few years. The modern Chicago Cubs and Atlanta Braves franchises trace their histories back to the National Association of Professional Base Ball Players in
5063-429: The hole " between the corner and middle infielders. Starting pitchers were no longer expected to throw complete games ; it was enough for a starter to pitch 6–7 innings and turn the game over to the team's closer , a position which grew in importance over these decades. As stolen bases increased, home run totals dropped. After Willie Mays hit 52 home runs in 1965, only one player ( George Foster ) reached that mark until
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#17327733605095146-410: The introduction of the designated hitter rule in 1973, which encouraged AL managers to largely abandon "smallball" tactics. However, with the advent of free agency in the 1970s allowing for more player movement between leagues, the introduction of regular season interleague play in 1997, umpires working games across MLB beginning in 1999, and the NL's adoption of the designated hitter rule in 2022,
5229-401: The juice of licorice, which some players would chew for the purpose of discoloring the ball. Also, pitchers could manipulate the ball through the use of the spitball (In 1921, use of this pitch was restricted to a few pitchers with a grandfather clause ). Additionally, many ballparks had large dimensions, such as the West Side Grounds of the Chicago Cubs, which was 560 feet (170 m) to
5312-404: The major league clubs, and the MLB Draft League , a hybrid amateur-professional showcase league. MLB and the World Baseball Softball Confederation jointly manage the international World Baseball Classic tournament. In the 1860s, aided by soldiers playing the game in camp during the Civil War , "New York"-style baseball expanded into a national game and spawned baseball's first governing body,
5395-485: The major leagues. Satchel Paige was signed by the Indians and the Dodgers added star catcher Roy Campanella and Don Newcombe , who was later the first winner of the Cy Young Award for his outstanding pitching. MLB banned the signing of women to contracts in 1952, but that ban was lifted in 1992. There have been no female MLB players since then. From 1903 to 1952, the major leagues consisted of two eight-team leagues whose 16 teams were located in ten cities, all in
5478-405: The major-league status of the Union Association by pointing out that franchises came and went and that the St. Louis club was deliberately "stacked"; the St. Louis club was owned by the league's president and it was the only club that was close to major-league caliber. In December 2020, Major League Baseball announced its recognition of seven leagues within Negro league baseball as major leagues:
5561-471: The nature of professional baseball, putting a higher premium on speed and defense over home-run hitting power since the fields were often too big for teams to expect to hit many home runs and foul balls hit in the air could more easily be caught for outs. Teams began to be built around pitching—particularly their bullpens—and speed on the basepaths. Artificial surfaces meant balls traveled quicker and bounced higher, so it became easier to hit ground balls " in
5644-527: The northeastern and mid-western United States: New York City had three teams and Boston , Chicago, Philadelphia , and St. Louis each had two teams. St. Louis was the southernmost and westernmost city with a major league team. The longest possible road trip, from Boston to St. Louis, took about 24 hours by railroad. After a half-century of stability, starting in the 1950s, teams began to move out of cities with multiple teams into cities that had not had them before. From 1953 to 1955, three teams moved to new cities:
5727-402: The other league. The initial plan was to have three five-team divisions per league with inter-league play year-round—possibly as many as 30 interleague games per team each year. For various reasons, it soon seemed more practical to have an even number of teams in both leagues. The Milwaukee Brewers agreed to change leagues to become the National League's 16th team, moving from the AL Central to
5810-504: The outside protector could continue to do so. Most umpires made the switch to the inside protector, led by Don Denkinger in 1975 and Jim Evans the next year, although several did not, including Bill Haller , Russ Goetz , George Maloney , Bill Kunkel and Jerry Neudecker , who became the last full-time MLB umpire to use the outside protector in 1985. In 1994, the league, along with the National League, reorganized again, this time into three divisions (East, West, and Central ) and added
5893-403: The pennant winner. The first modern World Series was played in 1903 and, after a hiatus in 1904, has taken place every season except 1994, when a players' strike forced the cancellation of the postseason . The current AL pennant holders are the New York Yankees , who beat the Cleveland Guardians for the pennant on October 19, 2024. In 1969, the AL split into two divisions, and the teams with
5976-519: The point that the 1942 season was nearly canceled. On January 14, 1942, MLB Commissioner Kenesaw Mountain Landis wrote to U.S. President Franklin D. Roosevelt , pleading for the continuation of baseball during the war. Roosevelt responded, "I honestly feel that it would be best for the country to keep baseball going. There will be fewer people unemployed and everybody will work longer hours and harder than ever before. And that means that they ought to have
6059-542: The reserve clause, led to the organization of the Major League Baseball Players Association to collectively bargain with the owners, which in turn led to the introduction of free agency in baseball. Modern stadiums with artificial turf surfaces began to change the game in the 1970s and 1980s. Home runs dominated the game during the 1990s. In the mid-2000s, media reports disclosed the use of anabolic steroids among MLB players;
6142-533: The resulting bidding war for players led to widespread contract-breaking and legal disputes. The war between the AL and NL caused shock waves throughout the baseball world. At a meeting at the Leland Hotel in Chicago in 1901, the other baseball leagues negotiated a plan to maintain their independence. A new National Association was formed to oversee these minor leagues. After 1902, the NL, AL, and NA signed
6225-440: The rival National League , as it had the designated hitter rule. Under the rule, a team may use a batter in its lineup who is not in the field defensively, replacing the pitcher in the batting order, compared to the old rule that made it mandatory for the pitcher to bat. In the last two decades, the season schedule has allowed occasional interleague play. In 1969, the AL (and NL) were divided into East and West divisions, with
6308-571: The sport. MLB rose in popularity in the decade following the Black Sox Scandal, and unlike major leagues in other sports it endured the Great Depression and World War II without any of its teams folding. Shortly after the war, Jackie Robinson broke baseball's color barrier . Some teams moved to different cities in the 1950s and 1960s. The AL and NL added eight clubs in the 1960s: two in 1961, two in 1962, and four in 1969. Player discontent with established labor practices, especially
6391-408: The two pennant winners meeting in the World Series. The AL and NL also employed and trained their own umpires , who only worked regular season games in their own league. These differences resulted in the leagues developing slightly different strategies and styles of play. The American League was usually regarded as the less "traditional" league during the 20th century, a reputation most exemplified by
6474-454: The use of new, white baseballs whenever a ball became scuffed or dirty, helping bring the "dead-ball" era to an end. The following year, the New York Yankees made their first World Series appearance. By the end of the 1930s, the team had appeared in 11 World Series, winning eight of them. Yankees slugger Babe Ruth had set the single-season home run record in 1927, hitting 60 home runs; breaking his own record of 29 home runs. Afflicted by
6557-399: Was "absorbing the available Negro Leagues numbers into the official historical record." The period between 1900 and 1919 is commonly referred to as the "dead-ball era". Games of this era tended to be low-scoring and were often dominated by pitchers, such as Walter Johnson , Cy Young , Christy Mathewson , Mordecai Brown , and Grover Cleveland Alexander . The term also accurately describes
6640-910: Was a result of players using steroids and other performance-enhancing drugs . In 1993, the National League added the Florida Marlins in Miami and the Colorado Rockies in Denver . In 1998, the Brewers switched leagues by joining the National League, and two new teams were added: the National League's Arizona Diamondbacks in Phoenix and the American League's Tampa Bay Devil Rays in Tampa Bay . American League The American League of Professional Baseball Clubs , known simply as
6723-619: Was later referred to as "The Noble Experiment", Robinson was the first black baseball player in the International League since the 1880s, joining the Dodgers' farm club, the Montreal Royals , for the 1946 season. The following year, the Dodgers called up Robinson to the major leagues. On April 15, 1947, Robinson made his major league debut at Ebbets Field before a crowd of 26,623 spectators, including more than 14,000 black patrons. Black baseball fans began flocking to see
6806-534: Was league president from 1931 to 1958. The format of the ALCS was changed from a best-of-five to a best-of-seven format in the 1985 postseason. In 1995, an additional playoff series was added when MLB restructured into three divisions in each league. As of 2022, the winners of the Eastern , Central , and Western Divisions , as well as the three AL Wild Card winners , play in the AL Division Series ,
6889-449: Was persuaded to move to California, Time magazine put O'Malley on its cover. MLB Commissioner Ford C. Frick had opposed the meeting, but the dual moves proved successful for both franchises—and for MLB. Had the Dodgers moved out west alone, the St. Louis Cardinals —1,600 mi (2,575 km) away —would have been the closest NL team. Instead, the joint move made West Coast road trips economical for visiting teams. The Dodgers set
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