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Major League Baseball all-time rosters

American League

East Division	Baltimore Orioles Boston Red Sox New York Yankees Tampa Bay Rays Toronto Blue Jays
Central Division	Chicago White Sox Cleveland Guardians Detroit Tigers Kansas City Royals Minnesota Twins
West Division	Houston Astros Los Angeles Angels Oakland Athletics Seattle Mariners Texas Rangers

National League

East Division	Atlanta Braves Miami Marlins New York Mets Philadelphia Phillies Washington Nationals
Central Division	Chicago Cubs Cincinnati Reds Milwaukee Brewers Pittsburgh Pirates St. Louis Cardinals
West Division	Arizona Diamondbacks Colorado Rockies Los Angeles Dodgers San Diego Padres San Francisco Giants

Defunct teams
National League	Baltimore Orioles (19th century) Buffalo Bisons Cincinnati Reds (1876–1879) Cleveland Blues Cleveland Spiders Detroit Wolverines Hartford Dark Blues Indianapolis Blues Indianapolis Hoosiers (NL) Kansas City Cowboys (NL) Louisville Colonels Louisville Grays Milwaukee Grays New York Mutuals Philadelphia Athletics Providence Grays St. Louis Brown Stockings Syracuse Stars (NL) Troy Trojans Washington Nationals (1886–1889) Washington Senators (1891–1899) Worcester Worcesters
American Association	Boston Reds (AA) Cincinnati Kelly's Killers Columbus Buckeyes Columbus Solons Indianapolis Hoosiers (AA) Kansas City Cowboys Milwaukee Brewers (AA) New York Metropolitans Philadelphia Athletics (1882–1890) Philadelphia Athletics (1891) Richmond Virginians Rochester Broncos Syracuse Stars Toledo Blue Stockings Toledo Maumees Washington Nationals (AA)
Union Association	Altoona Mountain City Baltimore Monumentals Boston Reds (UA) Chicago Browns/Pittsburgh Stogies Cincinnati Outlaw Reds Kansas City Cowboys (UA) Milwaukee Brewers (UA) Philadelphia Keystones St. Louis Maroons St. Paul Saints Washington Nationals Wilmington Quicksteps
Players' League	Boston Reds (PL) Brooklyn Ward's Wonders Buffalo Bisons (PL) Chicago Pirates Cleveland Infants New York Giants (PL) Philadelphia Athletics (PL) Pittsburgh Burghers
Federal League	Baltimore Terrapins Brooklyn Tip-Tops Buffalo Blues Chicago Whales Indianapolis Hoosiers/Newark Pepper Kansas City Packers Pittsburgh Rebels St. Louis Terriers