Major League Baseball - Teams

Other concurrent baseball leagues:
FL · USBL · Negro

F i l t e r & S o r t

a.k.a. of Anaheim
1961-2021 61 1

Joined the American League as an expansion team to begin the 1961 season. Left Los Angeles and relocated to Anaheim to begin the 1966 season.

Arizona Diamondbacks

1998-2021 24 1

Joined the National League as an expansion team to begin the 1998 season.

Atlanta Braves

1966-2021 56 2

Left the National Association to become one of 8 founding clubs of the NL in 1876. Left Boston and relocated to Milwaukee in 1953. Left Milwaukee to become the Atlanta Braves in 1966.

Baltimore Orioles

1954-2021 68 3

Began as Milwaukee Brewers in 1894 and were one of the original AL franchises in 1901. Became St. Louis Browns in 1902 and relocated to Baltimore to become Orioles in 1954.

Boston Americans

a.k.a. Red Sox
1901-2021 121 9

One of the eight original American League teams beginning with the 1901 season.

Chicago Orphans

a.k.a. Cubs
1901-2021 121 3

Left the National Association to become one of 8 founding clubs of the National League in 1876.

Chicago White Sox

1901-2021 121 4

One of the eight original American League teams beginning with the 1901 season.

Cincinnati Reds

a.k.a. Redlegs
1901-2021 121 5

Left the American Association to join the National League to begin the 1890 season. Franchise currently exists as the Cincinnati Reds.

Cleveland Bluebirds

a.k.a. Bronchos, Indians, Naps
1901-2021 121 2

One of the eight original American League teams beginning with the 1901 season.

Colorado Rockies

1993-2021 29

Joined the National League as an expansion team to begin the 1993 season.

Detroit Tigers

1901-2021 121 4

One of the eight original American League teams beginning with the 1901 season.

Florida Marlins

1993-2021 29 2

Joined the National League as an expansion team to begin the 1993 season.

Houston Colt .45's

a.k.a. Astros
1962-2021 60 1

Joined the National League as an expansion team to begin the 1962 season. Moved to the American League in 2013 in order to faciliate MLB divisional realignment.

Kansas City Royals

1969-2021 53 2

Joined the American League as an expansion team to begin the 1969 season.

Los Angeles Dodgers

1958-2021 64 6

Left the American Association to join the National League to begin the 1890 season. Left Brooklyn and relocated to become the Los Angeles Dodgers in 1957.

Milwaukee Brewers

1970-2021 52

Joined the American League as an expansion team to begin the 1969 season. Left Seattle and relocated to Milwaukee to begin the 1970 season. Moved to the National League in 1998 in order to faciliate MLB divisional realignment.

Minnesota Twins

1961-2021 61 2

One of the eight original American League teams beginning with the 1901 season. Left Washington DC to relocate to Minnesota to begin the 1961 season.

Washington Nationals

2005-2021 17 1

Joined the National League as an expansion team to begin the 1969 season. Left Montreal and relocated to Washington DC to begin the 2005 season.

New York Mets

1962-2021 60 2

Joined the National League as an expansion team to begin the 1962 season.

New York Highlanders

a.k.a. Yankees
1903-2021 119 27

One of the eight original American League teams beginning with the 1901 season. Left Baltimore and relocated to New York to begin the 1903 season.

Oakland Athletics

1968-2021 54 4

One of the eight original American League teams beginning with the 1901 season. Left Philadelphia to relocate in Kansas City to begin the 1955 season. Left Kansas City to relocate to Oakland to begin the 1968 season.

Philadelphia Phillies

a.k.a. Blue Jays
1901-2021 121 2

Entered the National League in 1883. Franchise currently exists as the Philadelphia Phillies.

Pittsburg Pirates

1901-2021 121 7

Left the American Association to join the National League to begin the 1887 season. Franchise currently exists as the Pittsburgh Pirates.

San Diego Padres

1969-2021 53

Joined the National League as an expansion team to begin the 1969 season.

Seattle Mariners

1977-2021 45

Joined the American League as an expansion team to begin the 1977 season.

San Francisco Giants

1958-2021 64 3

Entered the National League in 1883. Left New York and relocated to San Francisco to begin the 1958 season.

St. Louis Cardinals

1901-2021 121 11

After the American Association folded, they joined the National League in 1892. Franchise currently exists as the St. Louis Cardinals.

Tampa Bay Devil Rays

a.k.a. Rays
1998-2021 24

Joined the American League as an expansion team to begin the 1998 season.

Texas Rangers

1972-2021 50

Joined the American League as an expansion team to begin the 1961 season. Left Washington DC and relocated to Arlington in 1972.

Toronto Blue Jays

1977-2021 45 2

Joined the American League as an expansion team to begin the 1977 season.

Montreal Expos

1969-2004 36

Joined the National League as an expansion team to begin the 1969 season. Left Montreal and relocated to Washington DC to begin the 2005 season.

Washington Senators

1961-1971 11

Joined the American League as an expansion team to begin the 1961 season. Left Washington DC and relocated to Arlington in 1972.

Seattle Pilots

1969-1969 1

Kansas City Athletics

1955-1967 13

Milwaukee Braves

1953-1965 13 1

Left the National Association to become one of 8 founding clubs of the NL in 1876. Left Boston and relocated to Milwaukee in 1953. Left Milwaukee to become the Atlanta Braves in 1966.

Washington Senators

1901-1960 60 1

One of the eight original American League teams beginning with the 1901 season. Left Washington DC to relocate to Minnesota to begin the 1961 season.

Brooklyn Superbas

a.k.a. Dodgers, Robins, Trolley Dodgers
1901-1957 57 1

Left the American Association to join the National League to begin the 1890 season. Left Brooklyn and relocated to become the Los Angeles Dodgers in 1957.

New York Giants

1901-1957 57 5

Entered the National League in 1883. Left New York and relocated to San Francisco to begin the 1958 season.

Philadelphia Athletics

1901-1954 54 6

St. Louis Browns

1902-1953 52

Began as Milwaukee Brewers in 1894 and were one of the original AL franchises in 1901. Became St. Louis Browns in 1902 and relocated to Baltimore to become Orioles in 1954.

Boston Beaneaters

a.k.a. Bees, Braves, Doves, Rustlers
1901-1952 52 1

Left the National Association to become one of 8 founding clubs of the NL in 1876. Left Boston and relocated to Milwaukee in 1953. Left Milwaukee to become the Atlanta Braves in 1966.

Baltimore Orioles

1901-1902 2

One of the eight original American League teams beginning with the 1901 season. Left Baltimore and relocated to New York to begin the 1903 season.

Milwaukee Brewers

1901-1901 1

Began as Milwaukee Brewers in 1894 and were one of the original AL franchises in 1901. Became St. Louis Browns in 1902 and relocated to Baltimore to become Orioles in 1954.

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