The following is a timeline of franchise evolution in Major League Baseball. The histories of franchises in the National Association of Base Ball Players (NABBP), National Association of Professional Base Ball Players (NA), Union Association (UA), and American Association (AA) before they joined the National League (NL) are also included. In 1900 the minor league Western League renamed itself the American League (AL). All of the 1899 Western League teams were a part of the transformation with the Saint Paul Apostles moving to Chicago and to play as the White Stockings. In 1901 the AL declared itself a Major League. For its inaugural major league season the AL dropped its teams in Indianapolis, Buffalo and Minneapolis and replaced them with franchises in Boston, Philadelphia, and Baltimore and the Kansas City Blues moved to Washington to play as the Senators.
In 2020, Major League Baseball designated the following seven Negro Leagues from 1920–1948 as major leagues:[1] Negro National League I (NNL), Eastern Colored League (ECL), American Negro League (ANL), East–West League (EWL), Negro Southern League (NSL), Negro National League II (NNL), and Negro American League (NAL).
The timeline has not yet been fully updated to reflect that designation (in addition, the timeline does not include any non-National League/American League teams which existed at the Major League level from 1876 to 1915).
The History of organizational changes section includes all leagues and which have been designated as major league by MLB, listed chronologically by founding date:
- National League (NL) (1876–present)
- American Association (AA) (1882–1891)
- Union Association (UA) (1884)
- Players' League (PL) (1890)
- American League (AL) (1901–present)
- Federal League (FL) (1914–1915)
- Negro National League I (NNL) (1920–1931)
- Eastern Colored League (ECL) (1923–1928)
- American Negro League (ANL) (1929)
- East–West League (EWL) (1932)
- Negro Southern League (NSL) (1932)
- Negro National League II (NNL) (1933–1948)
- Negro American League (NAL) (1937–1948)
MLB timeline edit
The first line is the formation of the National League in 1876, and the second is the transformation of the American League to a major league in 1901. The third line is the beginning of the expansion era in 1961.
World Series championships are shown with a "*", National League Pennants before the World Series are shown with a "^", and American League Pennants before the World Series "#". No World Series was played in 1904, so the pennant winners for each league are indicated. Due to the 1994-95 Major League Baseball strike, there were no pennant winners or World Series in 1994, so this year is left blank.
History of organizational changes edit
- Source: The Baseball Encyclopedia (10 ed.). Macmillan General Reference. 1996. ISBN 978-0028608150.
- Note: Team names are given here according to the convention used by The Baseball Encyclopedia, which regularized them into the familiar form of modern team names. However, most teams in the early period had no name, aside from that of the club (as in "Hartford Base Ball Club" or "Athletic Base Ball Club of Philadelphia"), and nicknames like "Beaneaters," "Perfectos" and the many allusions to uniform colors were inventions by the florid sportswriters of the day.[2]
Pre-modern Era (1876–1900) edit
1876: Founding of the National League (NL) edit
The NL was established with eight teams.
Only season in NL § |
Boston Red Caps | Louisville Grays | |
Chicago White Stockings | New York Mutuals§ | |
Cincinnati Reds | Philadelphia Athletics§ | |
Hartford Dark Blues | St. Louis Brown Stockings |
1877 edit
- The New York Mutuals and Philadelphia Athletics were expelled.
- The Hartford Dark Blues moved to Brooklyn and became the Brooklyn Hartfords.
Team folded after this season ^ |
Boston Red Caps | Cincinnati Reds | |
Brooklyn Hartfords^ | Louisville Grays^ | |
Chicago White Stockings | St. Louis Brown Stockings^ |
1878 edit
- The Brooklyn Hartfords, Louisville Grays, and St. Louis Brown Stockings folded.
- The Indianapolis Blues, Milwaukee Grays, and Providence Grays joined.
First season in NL * | Only season in NL § |
Boston Red Caps | Indianapolis Blues§ | |
Chicago White Stockings | Milwaukee Grays§ | |
Cincinnati Reds | Providence Grays* |
1879 edit
- The Indianapolis Blues and Milwaukee Grays folded.
- The Buffalo Bisons, Cleveland Blues, Syracuse Stars, and Troy Trojans joined.
First season in NL * | Only season in NL § | Team disbanded after this season ^ |
Boston Red Caps | Cleveland Blues* | |
Buffalo Bisons* | Providence Grays | |
Chicago White Stockings | Syracuse Stars§ | |
Cincinnati Reds^ | Troy Trojans* |
1880 edit
- The Syracuse Stars folded.
- The Cincinnati Reds disbanded and were replaced by the Cincinnati Stars.
- The Worcester Worcesters joined.
First season in NL * | Only season in NL § |
Boston Red Caps | Cleveland Blues | |
Buffalo Bisons | Providence Grays | |
Chicago White Stockings | Troy Trojans | |
Cincinnati Stars§ | Worcester Worcesters* |
1881 edit
- The Cincinnati Stars were expelled because they refused to sign a league-wide pledge to ban alcohol at ballparks.
- The Detroit Wolverines joined.
First season in NL * |
Boston Red Caps | Detroit Wolverines* | |
Buffalo Bisons | Providence Grays | |
Chicago White Stockings | Troy Trojans | |
Cleveland Blues | Worcester Worcesters |
1882: Establishment of the American Association (AA) edit
The AA was established with six teams.
Team folded after this season ^ |
1883 edit
- The Troy Trojans and Worcester Worcesters folded.
- The New York Gothams and Philadelphia Quakers joined the NL.
- The Columbus Buckeyes and New York Metropolitans joined the AA.
- The Boston Red Caps became the Boston Beaneaters.
- The new St. Louis Brown Stockings became the St. Louis Browns.
First MLB season * |
1884: The Union Association (UA) as a third league edit
- The UA was established with 8 teams.
- The Brooklyn Atlantics, Indianapolis Hoosiers, Toledo Blue Stockings, and Washington Nationals joined the AA.
- The Altoona Mountain Citys folded early-season and were replaced by the Kansas City Cowboys.
- The Washington Nationals from the AA folded mid-season and were replaced by the Richmond Virginians from Minor League Baseball.
- The Philadelphia Keystones folded mid-season and were replaced by the Wilmington Quicksteps from Minor League Baseball.
- The Chicago Browns moved to Pittsburgh and became the Pittsburgh Stogies.
- The Wilmington Quicksteps and Pittsburgh Stogies folded late-season and were replaced by the Milwaukee Brewers from Minor League Baseball and St. Paul Saints, respectively.
First season in AA * | Only season in AA/Folds mid-season § | Last season in AA or NL ^ |
1885: Back to two leagues edit
- The UA disbanded.
- The St. Louis Maroons from the UA joined the NL.
- The Cleveland Blues, Columbus Buckeyes, Indianapolis Hoosiers, Toledo Blue Stockings, and Washington Nationals folded.
- The Richmond Virginians returned to Minor League Baseball.
- The New York Gothams became the New York Giants.
- The Brooklyn Atlantics became the Brooklyn Grays.
- The Louisville Eclipse became the Louisville Colonels.
Team moved from the former UA ** | Last season in NL ^ |
1886 edit
- The Buffalo Bisons transferred to Minor League Baseball.
- The Providence Grays folded.
- A new Kansas City Cowboys and Washington Nationals joined the NL.
First season in NL * | Only season in NL § |
1887 edit
- The Kansas City Cowboys folded.
- The St. Louis Maroons moved to Indianapolis and became the Indianapolis Hoosiers.
- The Pittsburgh Alleghenys transferred to the NL.
- A new Cleveland Blues joined the AA.
First season in AA * | Team moved from AA ** | Last season in AA ^ |
1888 edit
- The Brooklyn Grays became the Brooklyn Bridegrooms.
- The New York Metropolitans folded.
- A new Kansas City Cowboys joined the AA.
First season in AA * | Last season in NL ^ |
1889 edit
- The Detroit Wolverines folded.
- The Cleveland Blues transferred to the NL and became the Cleveland Spiders.
- The Columbus Solons joined the AA.
First season in AA * | Team moved from AA ** | Last season in AA or NL ^ |
1890: The Players' League (PL) as a third league edit
- The PL was established with 8 teams.
- The Chicago White Stockings became the Chicago Colts.
- The Philadelphia Quakers became the Philadelphia Phillies.
- The Brooklyn Bridegrooms transferred to the NL.
- The Cincinnati Red Stockings transferred to the NL and became the Cincinnati Reds.
- The Indianapolis Hoosiers, Kansas City Cowboys, and Washington Nationals folded.
- The Baltimore Orioles transferred to Minor League Baseball and were replaced by the Brooklyn Gladiators. The Brooklyn Gladiators then folded mid-season, and the Baltimore Orioles returned to the AA to finish the season.
- The Rochester Broncos, a new Syracuse Stars, and the Toledo Maumees joined the AA.
Team moved from AA ** | Only season in AA § |
1891: Last AA season edit
- The PL disbanded.
- The Brooklyn Bridegrooms became the Brooklyn Grooms.
- The Pittsburgh Alleghenys became the Pittsburgh Pirates.
- The Boston Reds from the PL joined the AA.
- The new Philadelphia Athletics from the AA were expelled and replaced by the new Philadelphia Athletics from the PL.
- The Cincinnati Kelly's Killers joined the AA. They then folded mid-season and were replaced by the new Milwaukee Brewers from Minor League Baseball.
- The Washington Statesmen joined the AA.
First MLB season * | Only season in MLB § | Last MLB season ^ |
1892: NL monopoly edit
- The AA folded.
- The Baltimore Orioles, Louisville Colonels, St. Louis Browns, and Washington Statesmen (all from the AA) joined the NL.
- The Washington Statesmen became the Washington Senators.
Teams move from the former AA ** |
1896 edit
The Brooklyn Grooms became the Brooklyn Bridegrooms again.
1898 edit
The Chicago Colts became the Chicago Orphans.
1899 edit
- The Brooklyn Bridegrooms became the Brooklyn Superbas.
- The St. Louis Browns became the St. Louis Perfectos.
Team folded after this season ^ |
1900: Classic Eight edit
- The Baltimore Orioles, Cleveland Spiders, Louisville Colonels, and Washington Senators folded.
- The St. Louis Perfectos became the St. Louis Cardinals.
Boston Beaneaters | New York Giants | |
Brooklyn Superbas | Philadelphia Phillies | |
Chicago Orphans | Pittsburgh Pirates | |
Cincinnati Reds | St. Louis Cardinals |
Birth of the Modern Era (1901–1919) edit
1901: Founding of the American League (AL) edit
The AL was established with eight teams.
1902 edit
- The new Milwaukee Brewers moved to St. Louis and became the St. Louis Browns.
- The Cleveland Blues became the Cleveland Bronchos
Team folded after this season ^ |
1903: National Agreement and Founding of Major League Baseball (MLB) edit
- The National League and American League sign the National Agreement, forming Major League Baseball, cementing their cooperation as two leagues under one banner.
- The new Baltimore Orioles folded.
- The New York Highlanders joined the AL.
- The Cleveland Bronchos became the Cleveland Naps.
- The Chicago Orphans became the Chicago Cubs.
First AL season * |
1904 edit
The Chicago White Stockings became the Chicago White Sox.
1907 edit
The Boston Beaneaters became the Boston Doves.
1908 edit
The Boston Americans became the Boston Red Sox.
1911 edit
- The Boston Doves became the Boston Rustlers.
- The Brooklyn Superbas became the Brooklyn Trolley Dodgers.
1912 edit
The Boston Rustlers became the Boston Braves.
1913 edit
- The New York Highlanders became the New York Yankees.
- The Brooklyn Trolley Dodgers became the Brooklyn Dodgers.
1914 edit
- The Federal League (FL) declared itself as a "third major league" with its own eight teams, and competed with the NL and AL.
- The Brooklyn Dodgers became the Brooklyn Robins.
1915 edit
- The Cleveland Naps became the Cleveland Indians.
- The Buffalo Buffeds became the Buffalo Blues.
- The Chicago Federals became the Chicago Whales.
- The new Indianapolis Hoosiers moved to Newark, New Jersey, and became the Newark Peppers.
1916 edit
The FL folded prior to the season.
Establishment of Negro Major Leagues (1920–1946) edit
1920: Establishment of the Negro National League (NNL) edit
The NNL was established with eight teams, the first black baseball league to be designated a major league.
Team withdrew after this season ^^ |
1921 edit
- The Dayton Marcos departed the NNL as an independent team.
- A new Columbus Buckeyes joined the NNL.
- The Cuban Stars became the Cincinnati Cuban Stars.
Only season in NNL § | Team folded after this season ^ |
1922 edit
- The Chicago Giants and Columbus Buckeyes folded.
- The Cleveland Tate Stars and Pittsburgh Keystones joined the NNL.
- The Cincinnati Cuban Stars became the Cuban Stars again.
- The St. Louis Giants became the St. Louis Stars
First season in NL * | Only season in NNL § |
1923: Founding of the Eastern Colored League (ECL) edit
- The ECL was established with six teams.
- The Pittsburgh Keystones folded.
- The Milwaukee Bears joined the NNL.
- The Cleveland Tate Stars departed from the NNL as an independent team and were replaced by the Toledo Tigers. The Toledo Tigers then folded mid-season, and the Cleveland Tate Stars returned to the NNL to finish the season.
Only season in NNL § | Team folded after this season ^ |
1924 edit
- The Milwaukee Bears folded.
- The Birmingham Black Barons and Cleveland Browns joined the NNL.
- The Harrisburg Giants and Washington Potomacs joined the ECL.
- After the Indianapolis ABCs temporarily drop out for the season in June, the Memphis Red Sox replace them
First season in NNL or ECL* | Only season in NNL § |
1925 edit
- The Cleveland Browns folded.
- The Indianapolis ABCs resume their tenure in the NNL.
- The Washington Potomacs moved to Wilmington, Delaware and became the Wilmington Potomacs and then folded mid-season.
Team folded mid-season ^ | Team withdrew after this season ^^ |
1926 edit
- The Cleveland Elites joined the NNL and folded mid-season.
- The Dayton Marcos returned to the NNL and departed mid-season as an independent team.
- The Newark Stars joined the ECL and folded mid-season.
- The Birmingham Black Barons and Memphis Red Sox departed the NNL and joined Minor League Baseball's Negro Southern League (NSL).
Only season in NNL or ECL, folded mid-season § | Team folded after this season ^ | Last season in NNL, withdrew mid-season ^^ |
1927 edit
- The Indianapolis ABCs folded.
- The Birmingham Black Barons and Memphis Red Sox returned to the NNL.
- The Cleveland Hornets joined the NNL.
Team rejoined from minor league Negro Southern League ** | Only season in NNL § | Last season in NNL or ECL ^ | Team departed after this season ^^ |
1928: Last ECL season edit
- The Cleveland Hornets folded.
- The Brooklyn Royal Giants, Harrisburg Giants and Hilldale Club withdrew from the ECL as independent teams.
- The Cleveland Tigers joined the NNL.
- The Philadelphia Tigers joined the ECL.
- The ECL then disbanded mid-season.
First season in MLB * | Only season in NNL or ECL § | Last MLB season ^ |
1929: Only American Negro League (ANL) season edit
- The ANL was established with six teams. Five of those teams were from the ECL. The independent Homestead Grays also joined the ECL.
- The Cleveland Tigers folded.
- The Philadelphia Tigers folded.
Team folded after this season ^ | Team independent after this season ^^ |
1930 edit
- The Atlantic City Bacharach Giants and the Cuban Stars from the ANL folded.
- The Baltimore Black Sox, Hilldale Club, Homestead Grays, and New York Lincoln Giants became independent teams.
- The ANL disbanded.
- The Louisville Black Caps and Nashville Elite Giants joined the NNL.
First season in NNL * | Team folded after this season ^ | Team departed after this season ^^ |
1931: Last NNL season edit
- The Cuban Stars folded.
- The Birmingham Black Barons and Memphis Red Sox departed the NNL and joined the NSL.
- The Kansas City Monarchs departed the NNL as an independent team (though remains loosely associated with the league).
- A new Indianapolis ABCs joined the NNL.
- The Chicago American Giants became the Chicago Columbia Giants
- The Louisville Black Caps became the Louisville White Sox
- The Nashville Elite Giants moved to Cleveland, Ohio and became the Cleveland Cubs.
- The NNL disbanded mid-season; although, teams continued to play each other as independent teams.
First season in NNL * | Team folded after this season ^ |
1932: Major league NSL season and only East–West League (EWL) season edit
- The Detroit Stars and St. Louis Stars folded.
- The Cleveland Cubs moved back to Nashville, Tennessee and became the Nashville Elite Giants again.
- The EWL was established with eight teams. Three of those teams, the Baltimore Black Sox, Hilldale Club, and Homestead Grays were from the ANL.
- The NSL was considered a major league for the season with 10 teams. Five of those teams, the Birmingham Black Barons, Chicago Columbia Giants, Indianapolis ABCs, Memphis Red Sox, and Nashville Elite Giants were from the NNL.
- The Brooklyn Robins became the Brooklyn Dodgers again.
- The Chicago Columbia Giants became the Chicago American Giants again.
- The Newark Browns departed mid-season as an independent team.
Team rejoined MLB ** | Only season in MLB § | Team folded after this season ^ | Team departed after this season ^^ |
1933: Establishment of the second NNL edit
- The Little Rock Grays and Columbus Turf Club folded.
- The Atlanta Black Crackers and Birmingham Black Barons withdrew as independent teams.
- The NSL was demoted to minor league status.
- The Cleveland Stars, Detroit Wolves, Hilldale Club, and Newark Browns folded.
- Pollock's Cuban Stars and the Washington Pilots withdrew as independent teams.
- The Baltimore Black Sox became the Baltimore Sox.
- The EWL disbanded.
- The second NNL was established with 7 teams. Five of those teams, the Baltimore Sox, Chicago American Giants, Homestead Grays, Indianapolis ABCs, and Nashville Elite Giants were from the NSL or EWL.
- The Pittsburgh Crawfords joined the NNL.
- The Indianapolis ABCs moved mid-season to Detroit, Michigan and became the Detroit Stars.
- The Columbus Blue Birds joined the NNL. The team disbanded and merged with the independent Akron Black Tyrites after the first half of the split season. The Akron Black Tyrites joined the NNL in place of the Columbus Blue Birds as the Akron Grays before they moved to Cleveland, Ohio and became the Cleveland Giants for one game.
First season in NNL * | Team moved from former EWL or NSL ** | Only season in NNL, folded mid-season § | Only season in NNL, joined mid-season §§ | Team folded after this season ^ | Team departed after this season ^^ |
1934 edit
- The Cleveland Giants and Detroit Stars folded.
- The Homestead Grays withdrew as an independent team.
- The Cleveland Red Sox, Newark Dodgers, Philadelphia Bacharach Giants, and Philadelphia Stars joined the NNL.
- The Baltimore Sox became the Baltimore Black Sox again.
First season in NNL * | Only season in NNL § | Team folded after this season ^ |
1935 edit
- The Cleveland Red Sox folded.
- The Baltimore Black Sox and Philadelphia Bacharach Giants withdrew as independent teams.
- The Brooklyn Eagles and New York Cubans joined the NNL and the Homestead Grays returned to the NNL.
- The Nashville Elite Giants moved to Columbus, Ohio and became the Columbus Elite Giants.
First season in NNL * | Team rejoined MLB ** | Only season in NNL § | Team folded after this season ^ | Team departed after this season ^^ |
1936 edit
- The Chicago American Giants withdrew.
- The Brooklyn Eagles and Newark Dodgers merged and became the Newark Eagles.
- The New York Black Yankees joined the NNL.
- The Columbus Elite Giants moved to Washington, D.C. and became the Washington Elite Giants.
- The Boston Braves became the Boston Bees.
First season in NNL * | Team departed after this season ^^ |
1937: Founding of the Negro American League (NAL) edit
- The NAL was established with eight teams. Four of those teams, the Birmingham Black Barons, Chicago American Giants, Kansas City Monarchs, and Memphis Red Sox were previously from the NSL or the first NNL.
- The New York Cubans withdrew.
Team rejoined MLB ** | Only season in NAL § |
1938 edit
- The Cincinnati Tigers, the new Detroit Stars, the Indianapolis Athletics, and the new St. Louis Stars folded.
- The Atlanta Black Crackers, a new Indianapolis ABCs, and the Jacksonville Red Caps joined the NAL.
- The Washington Black Senators joined the NNL.
- The Washington Elite Giants moved to Baltimore, Maryland and became the Baltimore Elite Giants.
First season in NAL * | Team rejoined MLB ** | Only season in NNL § | Team departed after this season ^^ |
1939 edit
- The Washington Black Senators folded.
- The Birmingham Black Barons withdrew.
- The New York Cubans returned to the NNL.
- The Indianapolis ABCs moved to St. Louis, Missouri and became the St. Louis Stars.
- The Atlanta Black Crackers moved to Indianapolis, Indiana and became the Indianapolis ABCs.
- The Jacksonville Red Caps moved to Cleveland, Ohio and became the Cleveland Bears.
- The Pittsburgh Crawfords moved to Toledo, Ohio and became the Toledo Crawfords.
- The Toledo Crawfords withdrew and joined the NAL mid-season.
Team joined NAL or rejoined NNL ** | Team folded after this season ^ | Team left NNL mid-season ^^ |
1940 edit
- The Indianapolis ABCs folded.
- The Birmingham Black Barons returned to the NAL.
- The St. Louis Stars split their home games between St. Louis, Missouri and New Orleans, Louisiana and became the St. Louis–New Orleans Stars.
- The Toledo Crawfords moved to Indianapolis, Indiana and became the Indianapolis Crawfords.
Team rejoined NAL ** | Team folded after this season ^ |
1941 edit
- The Indianapolis Crawfords folded.
- The Cleveland Bears moved back to Jacksonville, Florida and became the Jacksonville Red Caps again.
- The Boston Bees became the Boston Braves again.
Team temporarily folded after this season ^^ |
1942 edit
- The St. Louis–New Orleans Stars disbanded.
- The Cincinnati Buckeyes joined the NAL.
- The Jacksonville Red Caps folded mid-season.
- The Philadelphia Phillies became the Philadelphia Phils
First season in NAL * | Team folds mid-season ^ |
1943 edit
- The St. Louis–New Orleans Stars returned to the NNL as the Harrisburg–St. Louis Stars, since they moved to Harrisburg, Pennsylvania; although, they kept the St. Louis moniker as a part of their name. The team proceeded to withdraw in July to barnstorm, and then they folded.
- The Cincinnati Buckeyes moved to Cleveland, Ohio and became the Cleveland Buckeyes.
- The Cincinnati Clowns joined the NAL.
- The Philadelphia Phils revert to the Philadelphia Phillies.
First season in NAL * | Team folds mid-season ^ |
1944 edit
The Cincinnati Clowns split their home games between Cincinnati, Ohio and Indianapolis, Indiana and became the Cincinnati–Indianapolis Clowns.
1946 edit
The Cincinnati–Indianapolis Clowns stopped playing in Cincinnati, Ohio and permanently played in Indianapolis, Indiana and became the Indianapolis Clowns.
Integration, end of Negro Major Leagues, and Relocations (1947–1960) edit
1947 edit
The Brooklyn Dodgers, Cleveland Indians, and St. Louis Browns integrated.
Team has yet to integrate † |
1948 edit
Team has yet to integrate † | Team folded after this season ^ |
1949 edit
- The New York Black Yankees folded.
- Due to the ongoing process of integration, the NAL loses its major league status, while the NNL folded. All of the NNL teams, except for the newly independent Homestead Grays joined the NAL.
- The New York Giants integrated.
Team has yet to integrate † |
1950 edit
The Boston Braves integrated.
Team has yet to integrate † |
1951 edit
The Chicago White Sox integrated.
Team has yet to integrate † |
1953: Braves relocation to Milwaukee, and Cincinnati renaming edit
- The Boston Braves moved to Milwaukee and became the Milwaukee Braves.
- The Cincinnati Reds became the Cincinnati Redlegs.
- The Chicago Cubs, Philadelphia Athletics, and Pittsburgh Pirates integrated.
Team has yet to integrate † |
1954: Browns relocation to Baltimore edit
- The St. Louis Browns moved to Baltimore and became the Baltimore Orioles.
- The Cincinnati Redlegs, St. Louis Cardinals, and Washington Senators integrated.
Team has yet to integrate † |
1955: Athletics relocation to Kansas City edit
- The Philadelphia Athletics moved to Kansas City, Missouri, and became the Kansas City Athletics.
- The New York Yankees integrated.
Team has yet to integrate † |
1957 edit
The Philadelphia Phillies integrated.
Team has yet to integrate † |
1958: The NL exits New York for California edit
- The Brooklyn Dodgers moved to Los Angeles and became the Los Angeles Dodgers.
- The New York Giants moved to San Francisco and became the San Francisco Giants.
- The Detroit Tigers integrated.
Team has yet to integrate † |
1959: Cincinnati reverts back to the Reds edit
- The Cincinnati Redlegs became the Cincinnati Reds again.
- The Boston Red Sox integrated.
First expansion (1961–1968) edit
1961 relocation and expansion edit
- The Washington Senators moved to the Minneapolis–Saint Paul area and became the Minnesota Twins.
- The Los Angeles Angels and a new Washington Senators joined the AL.
1961 expansion team * |
1962 expansion edit
- The Houston Colt .45s and New York Mets joined the NL.
1962 expansion team * |
1965: Houston and Angels renaming edit
- The Houston Colt .45s became the Houston Astros.
- The Los Angeles Angels became the California Angels on September 2, 1965, with 28 games left in the season.
1966: Braves relocation to Atlanta edit
The Milwaukee Braves moved to Atlanta and became the Atlanta Braves.
1968: Athletics relocation to Oakland edit
The Kansas City Athletics moved to Oakland, California, and became the Oakland Athletics.
Birth of division play (1969–1993) edit
1969 expansion and realignment edit
- The Kansas City Royals and Seattle Pilots joined the AL.
- The Montreal Expos and San Diego Padres joined the NL.
- The two leagues each realigned into two six-team divisions
1969 expansion team * |
1970: Pilots relocation to Milwaukee edit
The Seattle Pilots moved to Milwaukee and became the Milwaukee Brewers.
1972: Senators relocation to the Dallas–Fort Worth metroplex edit
- The Washington Senators moved to Arlington, Texas, in the Dallas–Fort Worth metroplex and became the Texas Rangers.
- The Texas Rangers and Milwaukee Brewers switched divisions.
1977 expansion edit
- The Seattle Mariners joined the AL West.
- The Toronto Blue Jays joined the AL East.
1977 expansion team * |
1993 expansion edit
- The Colorado Rockies joined the NL West.
- The Florida Marlins joined the NL East.
1993 expansion team * |
Wild Card era (1994–present) edit
1994 realignment edit
MLB realigned to three divisions in each league to accommodate an expanded postseason format with a wild card team (although this new playoff format would not be fully implemented until 1995 due to a work stoppage):
- The AL Central was formed with the Cleveland Indians and Milwaukee Brewers transferring from the AL East, and the Chicago White Sox, Kansas City Royals, and Minnesota Twins transferred from the AL West.
- The NL Central was formed with the Chicago Cubs, Pittsburgh Pirates, and St. Louis Cardinals transferring from the NL East, and the Cincinnati Reds and Houston Astros transferred from the NL West.
- The Atlanta Braves transferred to the NL East.
1997: Angels renaming edit
The California Angels became the Anaheim Angels.
1998 expansion edit
- The Arizona Diamondbacks joined the NL West.
- The Tampa Bay Devil Rays joined the AL East.
- The Detroit Tigers transferred to the AL Central.
- In order to primarily continue intraleague play, the Milwaukee Brewers transferred to the NL Central so both leagues would have an even number of teams.
1998 expansion team * |
2005: Expos relocation and Angels renaming edit
- The Montreal Expos moved to Washington, D.C. and became the Washington Nationals.
- The Anaheim Angels became the Los Angeles Angels of Anaheim.
2008: Tampa Bay renaming edit
The Tampa Bay Devil Rays became the Tampa Bay Rays.
2012: Marlins renaming edit
The Florida Marlins became the Miami Marlins.
2013: Astros switch leagues edit
With interleague play expanded to occur throughout the season, the Houston Astros transferred to the AL West to accommodate each league with 15 clubs apiece.
2016: Angels renaming edit
The Los Angeles Angels of Anaheim became the Los Angeles Angels.
2022: Cleveland renaming edit
The Cleveland Indians became the Cleveland Guardians.
See also edit
References edit
- ^ "MLB officially designates the Negro Leagues as 'Major League'". MLB.com. Retrieved 2022-10-23.
- ^ According to the National League's 1877 Constitution, the member clubs were given as "Boston B. B. Club, Chicago B. B. Club, Cincinnati B. B. Club, Hartford B. B. Club, Louisville B. B. Club, St. Louis B. B. Club." Constitution and Playing Rules of the National League of Professional Base Ball Clubs. Chicago, A. G. Spalding 1877.