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All-America Football Conference founded.
Aligned into Eastern and Western divisions.
Eastern Division Western Division
Brooklyn Dodgers
Chicago Rockets
Buffalo Bisons
Cleveland Browns
Miami Seahawks
Los Angeles Dons
New York Yankees
San Francisco 49ers
Baltimore Colts enfranchised in Eastern Division.
Buffalo Bisons renamed Buffalo Bills.
Miami Seahawks fold. Realigned into single table.
Brooklyn Dodgers and New York Yankees merge into Brooklyn/New York Yankees.
Chicago Rockets renamed Chicago Hornets. Folded.
Baltimore Colts and San Francisco 49ers moved to National Football League American Conference.
Cleveland Browns moved to National Football League National Conference. American Football League founded.
Aligned into Eastern and Western divisions.
Eastern Division Western Division
Boston Patriots
Dallas Texans
Buffalo Bills
Denver Broncos
Houston Oilers
Los Angeles Chargers
New York Titans
Oakland Raiders
Los Angeles Chargers relocate as San Diego Chargers. Dallas Texans relocate as Kansas City Chiefs.
New York Titans renamed New York Jets. Miami Dolphins enfranchised in Eastern Division. Cincinnati Bengals enfranchised in Western Division. Folded.
Boston Patriots, Buffalo Bills, Miami Dolphins, and New York Jets moved to National Football League American Conference Eastern Division.
Cincinnati Bengals and Houston Oilers moved to National Football League American Football Conference Central Division.
Denver Broncos, Kansas City Chiefs, Oakland Raiders, and San Diego Chargers moved to National Football League American Football Conference Western Division. Canadian Football League founded.
Aligned into Interprovincial Rugby Football and Western Interprovincial Football unions.
Interprovincial Rugby Foootball Union Western Interprovincial Football Union
Hamilton Tiger-Cats
BC Lions
Montreal Alouettes
Calgary Stampeders
Ottawa Rough Riders
Edmonton Eskimos
Toronto Argonauts
Saskatchewan Roughriders
Winnipeg Blue Bombers
Realigned into Eastern Football Conference and Western Interprovincial Football Union.
Eastern Football Conference Western Interprovincial Football Union
Hamilton Tiger-Cats
BC Lions
Montreal Alouettes
Calgary Stampeders
Ottawa Rough Riders
Edmonton Eskimos
Toronto Argonauts
Saskatchewan Roughriders
Winnipeg Blue Bombers
Realigned into Eastern Football and Western Football conferences.
Eastern Football Conference Western Football Conference
Hamilton Tiger-Cats
BC Lions
Montreal Alouettes
Calgary Stampeders
Ottawa Rough Riders
Edmonton Eskimos
Toronto Argonauts
Saskatchewan Roughriders
Winnipeg Blue Bombers
Realigned into Eastern and Western divisions.
Eastern Division Western Division
Hamilton Tiger-Cats
BC Lions
Montreal Alouettes
Calgary Stampeders
Ottawa Rough Riders
Edmonton Eskimos
Toronto Argonauts
Saskatchewan Roughriders
Winnipeg Blue Bombers
Montreal Alouettes fold.
Montreal Concordes enfranchised in Eastern Division. Montreal Concordes renamed Montreal Alouettes. Montreal Alouettes fold.
Winnipeg Blue Bombers moved to Eastern Division. Sacramento Gold Miners enfranchised in Western Division. Baltimore CFLers and Shreveport Pirates enfranchised in Eastern Division.
Las Vegas Posse enfranchised in Western Division. Realigned into Northern and Southern divisions.
Baltimore CFLers renamed Baltimore Stallions.
Birmingham Barracudas, Memphis Mad Dogs, and San Antonio Texans enfranchised.
Las Vegas Posse or Sacramento Gold Miners fold.
Northern Division Southern Division
BC Lions
Baltimore Stallions
Calgary Stampeders
Birmingham Barracudas
Edmonton Eskimos
Memphis Mad Dogs
Hamilton Tiger-Cats
San Antonio Texans
Ottawa Rough Riders
Shreveport Pirates
Saskatchewan Roughriders
Toronto Argonauts
Winnipeg Blue Bombers
Realigned into Eastern and Western divisions.
Baltimore Stallions relocate as Montreal Alouettes.
Birmingham Barracudas, Memphis Mad Dogs, San Antonio Texans, and Shreveport Pirates fold.
Eastern Division Western Division
Hamilton Tiger-Cats
BC Lions
Montreal Alouettes
Calgary Stampeders
Ottawa Rough Riders
Edmonton Eskimos
Toronto Argonauts
Saskatchewan Roughriders
Winnipeg Blue Bombers
Ottawa Rough Riders fold.
Winnipeg Blue Bombers moved to Eastern Division. Ottawa Renegades enfranchised.
Winnipeg Blue Bombers moved to Western Division. Ottawa Renegades fold.
Winnipeg Blue Bombers moved to Eastern Division. Ottawa enfranchised in Eastern Division.
Winnipeg Blue Bombers moved to Western Division. Major League Baseball [ edit ] National League founded.
National League aligned into single-table.
National League
Boston Red Caps
Chicago White Stockings
Cincinnati Reds
Hartford Dark Blues
Louisville Grays
New York Mutuals
Philadelphia Athletics
St. Louis Brown Stockings
Hartford Dark Blues relocate as Hartfords of Brooklyn.
New York Mutuals and Philadelphia Athletics fold. Hartfords of Brooklyn, Louisville Grays, and St. Louis Brown Stockings fold.
Indianapolis Blues, Milwaukee Grays, and Providence Grays enfranchised. Buffalo Bisons, Cleveland Blues, Syracuse Stars, and Troy Trojans enfranchised.
Indianapolis Blues and Milwaukee Grays fold. Syracuse Stars fold.
Worcester Ruby Legs enfranchised. Cincinnati Reds fold.
Detroit Wolverines enfranchised. Boston Red Caps renamed Boston Beaneaters.
New York Giants and Philadelphia Quakers enfranchised.
Troy Trojans and Worcester Ruby Legs fold. Cleveland Blues fold.
New York Gothams renamed New York Giants.
St. Louis Maroons moved from Union Association. Buffalo Bisons and Providence Grays fold.
Kansas City Cowboys and Washington Senators enfranchised. Kansas City Cowboys.
Pittsburgh Alleghenys moved from American Association.
St. Louis Maroons relocate as Indianapolis Hoosiers. Cleveland Spiders moved from American Association.
Detroit Wolverines fold. Brooklyn Bridegrooms and Cincinnati Reds moved from American Association.
Chicago White Stockings renamed Chicago Colts.
Indianapolis Hoosiers and Washington Senators fold.
Philadelphia Quakers renamed Philadelphia Phillies. Brooklyn Bridegrooms renamed Brooklyn Grooms.
Pittsburgh Alleghenys renamed Pittsburgh Pirates. Baltimore Orioles, Louisville Colonels, St. Louis Browns, and Washington Senators moved from American Association. Brooklyn Grooms renamed Brooklyn Bridegrooms. Chicago Colts renamed Chicago Orphans. Brooklyn Bridegrooms renamed Brooklyn Superbas.
St. Louis Browns renamed St. Louis Perfectos. Baltimore Orioles, Cleveland Spiders, Louisville Colonels, and Washington Senators fold.
St. Louis Perfectos renamed St. Louis Colonels. American League founded.
American League aligned into single table.
American League National League
Baltimore Orioles
Boston Beaneaters
Boston Americans
Brooklyn Superbas
Cleveland Blues
Chicago Orphans
Detroit Tigers
Cincinnati Reds
Milwaukee Brewers
New York Giants
Philadelphia Athletics
Philadelphia Phillies
Washington Senators
Pittsburgh Pirates
White Stockings
St. Louis Cardinals
Cleveland Blues renamed Cleveland Bronchos.
Milwaukee Brewers relocate as St. Louis Browns. Baltimore Orioles relocate as New York Highlanders.
Chicago Orphans renamed Chicago Cubs.
Cleveland Bronchos renamed Cleveland Naps.
White Stockings renamed Chicago White Sox. Washington Senators renamed Washington Nationals. Boston Beaneaters renamed Boston Doves. Boston Americans renamed Boston Red Sox. Boston Doves renamed Boston Rustlers.
Brooklyn Superbas renamed Brooklyn Dodgers. Boston Rustlers renamed Boston Braves. Brooklyn Dodgers renamed Brooklyn Superbas.
New York Highlanders renamed New York Yankees. Brooklyn Superbas renamed Brooklyn Robins. Cleveland Naps renamed Cleveland Indians. Brooklyn Robins renamed Brooklyn Dodgers. Boston Braves renamed Boston Bees. Boston Bees renamed Boston Braves. Boston Braves relocate as Milwaukee Braves. Cincinnati Reds renamed Cincinnati Redlegs.
St. Louis Browns relocate as Baltimore Orioles. Philadelphia Athletics relocate as Kansas City Athletics. Washington Nationals renamed Washington Senators. Brooklyn Dodgers relocate as Los Angeles Dodgers.
New York Giants relocate as San Francisco Giants. Cincinnati Redlegs renamed Cincinnati Reds. Los Angeles Angels and a new Washington Senators enfranchised.
The already existing Washington Senators relocate as Minnesota Twins. Houston Colt .45's and New York Mets enfranchised. Houston Colt .45's renamed Houston Astros.
Los Angeles Angels renamed California Angels on September 2. Milwaukee Braves relocate as Atlanta Braves. Kansas City Athletics relocate as Oakland Athletics. American League realigned into Eastern and Western divisions.
National League realigned into Eastern and Western divisions.
Kansas City Royals, Montreal Expos, San Diego Padres, and Seattle Mariners enfranchised.
American League
Eastern Division Western Division
Baltimore Orioles
California Angels
Boston Red Sox
Chicago White Sox
Cleveland Indians
Kansas City Royals
Detroit Tigers
Minnesota Twins
New York Yankees
Oakland Athletics
Washington Senators
Seattle Pilots
National League
Eastern Division Western Division
Chicago Cubs
Atlanta Braves
Montreal Expos
Cincinnati Reds
New York Mets
Houston Astros
Philadelphia Phillies
Los Angeles Dodgers
Pittsburgh Pirates
San Diego Padres
St. Louis Cardinals
San Francisco Giants
Seattle Pilots relocate as Milwaukee Brewers. Milwaukee Brewers moved to Eastern Division.
Washington Senators relocate as Texas Rangers and moved to Western Division. Oakland Athletics renamed Oakland A's. Seattle Mariners enfranchised in American League Western Division.
Toronto Blue Jays enfranchised in American League Eastern Divison. Oakland A's renamed Oakland Athletics. Colorado Rockies enfranchised in National League Western Division.
Florida Marlins enfranchised in National League Eastern Division. American League realigned into Central, Eastern, and Western divisions.
National League realigned into Central, Easter, and Western divisions.
American League
Central Division Eastern Division Western Division
Chicago White Sox
Baltimore Orioles
California Angels
Cleveland Indians
Boston Red Sox
Oakland Athletics
Kansas City Royals
Detroit Tigers
Seattle Mariners
Milwaukee Brewers
New York Yankees
Texas Rangers
Minnesota Twins
Toronto Blue Jays
American League
Central Division Eastern Division Western Division
Chicago Cubs
Atlanta Braves
Colorado Rockies
Cincinnati Reds
Florida Marlins
Los Angeles Dodgers
Houston Astros
Montreal Expos
San Diego Padres
Pittsburgh Pirates
New York Mets
San Francisco Giants
St. Louis Cardinals
Philadelphia Phillies
California Angels renamed Anaheim Angels. Arizona Diamondbacks enfranchised in National League Western Division.
Detroit Tigers moved to American League Central Division.
Milwaukee Brewers moved to National League Central Division.
Tampa Bay Devil Rays enfranchised in American League Eastern Division. Anaheim Angels renamed Los Angeles Angels of Anaheim.
Montreal Expos relocate as Washington Nationals. Tampa Bay Devils Rays renamed Tampa Bay Rays. Florida Marlins renamed Miami Marlins. Houston Astros moved to American League Western Division. Major League Soccer [ edit ] Major League Soccer founded.
Aligned into Eastern and Western conferences.
Eastern Conference Western Conference
Columbus Crew
Colorado Rapids
D.C. United
Dallas Burn
New England Revolution
Kansas City Wiz
New York/New Jersey MetroStars
Los Angeles Galaxy
Tampa Bay Mutiny
San Jose Clash
Kansas City Wiz renamed Kansas City Wizards. Chicago Fire enfranchised in Western Conference.
Miami Fusion FC enfranchised in Eastern Conference.
New York/New Jersey MetroStars renamed MetroStars. Realigned into Central, Eastern, and Western divisions.
San Jose Clash renamed San Jose Earthquakes.
Central Division Eastern Division Western Division
Chicago Fire
D.C. United
Colorado Rapids
Columbus Crew
MetroStars
Kansas City Wizards
Dallas Burn
Miami Fusion FC
Los Angeles Galaxy
Tampa Bay Mutiny
New England Revolution
San Jose Earthquakes
Realigned into Eastern and Western Conferences.
Miami Fusion FC and Tampa Bay Mutiny fold.
Eastern Conference Western Conference
Chicago Fire
Colorado Rapids
Columbus Crew
Dallas Burn
D.C. United
Kansas City Wizards
MetroStars
Los Angeles Galaxy
New England Revolution
San Jose Earthquakes
C.D. Chivas USA and Real Salt Lake enfranchised in Western Conference.
Dallas Burn renamed FC Dallas
Kansas City Wizards moved to Eastern Conference. Houston Dynamo enfranchised in Western Conference.
MetroStars renamed New York Red Bulls.
San Jose Earthquakes suspended. Toronto FC enfranchised in Eastern Conference. San Jose Earthquakes return from suspension in Western Conference. Seattle Sounders FC enfranchised in Western Conference. Philadelphia Union enfranchised in Eastern Conference. Houston Dynamo moved to Eastern Conference.
Kansas City Wizards renamed Sporting Kansas City.
Portland Timbers and Vancouver Whitecaps FC. Montreal Impact enfranchised in Eastern Conference. National Basketball Association [ edit ] Basketball Association of America founded.
Aligned into Eastern and Western divisions.
Eastern Division Western Division
Boston Celtics
Chicago Stags
New York Knicks
Cleveland Rebels
Philadelphia Warriors
Detroit Falcons
Providence Steamrollers
Pittsburgh Ironmen
Toronto Huskies
St. Louis Bombers
Washington Capitols
Baltimore Bullets enfranchised in Western Division.
Cleveland Rebels, Detroit Falcons, Pittsburgh Ironmen, and Toronto Huskies fold.
Washington Capitols moved to Western Division. Baltimore Bullets and Washington Capitols moved to Eastern Division.
Fort Wayne Pistons and Rochester Royals moved to Western Division from National Basketball League Eastern Division.
Indianapolis Jets and Minneapolis Lakers moved to Western Division from National Basketball League Western Division. Renamed National Basketball Association.
Realigned into Central, Eastern, and Western divisions.
Anderson Packers and Syracuse Nationals moved from National Basketball League Eastern Division.
Denver Nuggets, Sheboygan Redskins, Tri-Cities Blackhawks, and Waterloo Hawks moved from National Basketball League Western Division.
Indianapolis Jets fold.
Indianapolis Olympians enfranchised.
Central Division Eastern Division Western Division
Chicago Stags
Baltimore Bullets
Anderson Packers
Fort Wayne Pistons
Boston Celtics
Denver Nuggets
Minneapolis Lakers
New York Knicks
Indianapolis Olympians
Rochester Roya;s
Philadelphia Warriors
Sheboygan Red Skins
St. Louis Bombers
Syracuse Nationals
Tri-Cities Blackhawks
Washington Capitols
Waterloo Hawks
Realigned into Eastern and Western divisions.
Anderson Packers, Chicago Stags, Denver Nuggets, St. Louis Bombers, Sheboygan Red Skins, and Waterloo Hawks fold.
Eastern Division Western Division
Baltimore Bullets
Fort Wayne Pistons
Boston Celtics
Indianapolis Olympians
New York Knicks
Minneapolis Lakers
Philadelphia Warriors
Rochester Royals
Syracuse Nationals
Tri-Cities Blackhawks
Washington Capitols
Washington Capitols fold on January 9, 1951. Tri-Cities Blackhawks relocate as Milwaukee Hawks. Indianapolis Olympians fold. Baltimore Bullets fold on November 27. Milwaukee Hawks relocate as St. Louis Hawks. Fort Wayne Pistons relocate as Detroit Pistons.
Rochester Royals relocate as Cincinnati Royals. Minneapolis Lakers relocate as Los Angeles Lakers. Chicago Packers enfranchised in Western Division. Chicago Packers renamed Chicago Zephyrs.
Cincinnati Royals moved to Eastern Division.
Philadelphia Warriors relocate as San Francisco Warriors and moved to Western Division. Chicago Zephyrs relocate as Baltimore Bullets.
Syracuse Nationals relocate as Philadelphia 76ers. Baltimore Bullets moved to Eastern Division.
Chicago Bulls enfranchised in Western Division. Detroit Pistons moved to Eastern Division.
San Diego Rockets and Seattle SuperSonics enfranchised in Western Division. Milwaukee Bucks enfranchised in Western Division.
Phoenix Suns enfranchised in Eastern Division.
St. Louis Hawks relocate as Atlanta Hawks. Realigned into Eastern and Western conference.
Eastern Conference aligned into Atlantic and Central divisions.
Western Conference aligned into Midwestern and Pacific divisions.
Buffalo Braves, Cleveland Cavaliers, and Portland Trail Blazers enfranchised.
Eastern Conference
Atlantic Division Central Division
Boston Celtics
Atlanta Hawks
Buffalo Braves
Baltimore Bullets
New York Knicks
Cincinnati Royals
Philadelphia 76ers
Cleveland Cavaliers
Western Conference
Midwestern Division Pacific Division
Chicago Bulls
Los Angeles Lakers
Detroit Pistons
Portland Trail Blazers
Milwaukee Bucks
San Diego Rockets
Phoenix Suns
San Francisco Warriors
Seattle SuperSonics
San Diego Rockets relocate as Houston Rockets.
San Francisco Warriors relocate as Golden State Warriors. Cincinnati Royals relocate as Kansas City-Omaha Kings and moved to Midwestern Division.
Houston Rockets moved to Central Division.
Phoenix Suns moved to Pacific Division. Baltimore Bullets relocate as Capital Bullets. Capital Bullets renamed Washington Bullets.
New Orleans Jazz enfranchised in Central Division. Kansas City-Omaha Kings relocate as Kansas City Kings. Denver Nuggets and Indiana Pacers moved to Midwestern Division from American Basketball Association.
New York Nets moved to Atlantic Division from American Basketball Association.
San Antonio Spurs moved to Central Division from American Basketball Association. New York Nets relocate as New Jersey Nets. Buffalo Braves relocate as San Diego Clippers and moved to Pacific Division.
Detroit Pistons moved to Central Division.
Washington Bullets moved to Atlantic Division. Indiana Pacers moved to Central Division.
New Orleans Jazz relocate as Utah Jazz and moved to Midwestern Division. Chicago Bulls and Milwaukee Bucks moved to Central Division.
Dallas Mavericks enfranchised in Midwestern Division.
Houston Rockets and San Antonio Spurs moved to Midwestern Division. San Diego Clippers relocate as Los Angeles Clippers. Kansas City Kings relocate as Sacramento Kings. Charlotte Hornets enfranchised in Atlantic Division.
Miami Heat enfranchised in Midwestern Division.
Sacramento Kings moved to Pacific Division. Charlotte Hornets moved to Midwestern Division.
Miami Heat moved to Atlantic Division.
Minnesota Timberwolves enfranchised in Midwestern Division.
Orlando Magic enfranchised in Central Division. Charlotte Hornets moved to Central Division.
Orlando Magic moved to Atlantic Division. Orlando Magic moved to Atlantic Division. Toronto Raptors enfranchised in Central Division.
Vancouver Grizzlies enfranchised in Midwestern Division. Washington Bullets renamed Washington Wizards. Vancouver Grizzlies relocate as Memphis Grizzlies. Charlotte Hornets relocate as New Orleans Hornets. Eastern Conference realigned into Atlantic, Central, and Southeastern Divisions.
Western Conference realigned into Northwestern, Pacific, and Southwestern Divisions.
Charlotte Bobcats enfranchised.
Eastern Conference
Atlantic Division Central Division Southeastern Division
Boston Celtics
Chicago Bulls
Atlanta Hawks
New Jersey Nets
Cleveland Cavaliers
Charlotte Bobcats
New York Knicks
Detroit Pistons
Miami Heat
Philadelphia 76ers
Indiana Pacers
Orlando Magic
Toronto Raptors
Milwaukee Bucks
Washington Wizards
Western Conference
Northwestern Division Pacific Division Southwestern Division
Denver Nuggets
Golden State Warriors
Dallas Mavericks
Minnesota Timberwolves
Los Angeles Clippers
Houston Rockets
Portland Trail Blazers
Los Angeles Lakers
Memphis Grizzlies
Seattle SuperSonics
Phoenix Suns
New Orleans Hornets
Utah Jazz
Sacramento Kings
San Antonio Spurs
New Orleans Hornets relocate as New Orleans/Oklahoma City Hornets. New Orleans/Oklahoma City Hornets relocate as New Orleans Hornets. Seattle SuperSonics relocate as Oklahoma City Thunder. New Jersey Nets relocate as Brooklyn Nets. Golden State Warriors relocate as San Francisco Warriors. American Professional Football Association founded.
Aligned into single table.
Akron Pros
Buffalo All-Americans
Canton Bulldogs
Chicago Cardinals
Chicago Tigers
Columbus Panhandles
Dayton Triangles
Decatur Staleys
Detroit Heralds
Hammond Pros
Muncie Flyers
Rochester Jeffersons
Rock Island Independents
Chicago Tigers fold.
Cleveland Tigers renamed Cleveland Indians.
Decatur Staleys relocate as Chicago Staleys.
Detroit Heralds renamed Detroit Tigers.
Cincinnati Celts, Evansville Crimson Giants, Green Bay Packers, Louisville Brecks, Minneapolis Marines, New York Brickley Giants, Tonawanda Kardex, and Washington Senators enfranchised.
Detroit Tigers fold on November 13. Renamed National Football League.
Chicago Staleys renamed Chicago Bears.
Cincinnati Celts, Cleveland Indians, Detroit Heralds, Muncie Flyers, New York Brickley Giants, Tonawanda Kardex, and Washington Senators fold.
Milwaukee Badgers, Oorang Indians, Racine Legion, and Toledo Maroons enfranchised. Cleveland Indians, Duluth Kelleys, and St. Louis All Stars enfranchised.
Evansville Crimson Giants fold. Buffalo All-Americans renamed Buffalo Bisons.
Canton Bulldogs relocate Cleveland Bulldogs.
Cleveland Indians, Louisville Brecks, Oorang Indians, St. Louis All Stars, and Toledo Maroons fold.
Frankford Yellow Jackets, Kansas City Blues, and Kenosha Maroons enfranchised. Canton Bulldogs, Detroit Panthers, New York Giants, Pottsville Maroons, and Providence Steam Roller enfranchised.
Kansas City Blues renamed Kansas City Cowboys.
Kenosha Maroons, Minneapolis Marines, and Racine Legion fold.
Pottsville Maroons suspended in December. Akron Pros renamed Akron Indians.
Brooklyn Lions, Hartford Blues, Los Angeles Buccaneers, Louisville Colonels, and Racine Tornadoes enfranchised.
Buffalo Bisons renamed Buffalo Rangers.
Cleveland Bulldogs, Rochester Jeffersons, and Rock Island Independents fold.
Duluth Kelleys renamed Duluth Eskimos.
Pottsville Maroons return from suspension.
Brooklyn Lions renamed Brooklyn Horsemen on November 21. Akron Indians, Canton Bulldogs, Columbus Tigers, Detroit Panthers, Hammond Pros, Hartford Blues, Kansas City Cowboys, Los Angeles Buccaneers, Louisville Colonels, Milwaukee Badgers, and Racine Tornadoes fold.
Brooklyn Horsemen renamed New York Yankees.
Buffalo Rangers renamed Buffalo Bisons.
Cleveland Bulldogs enfranchised. Buffalo Bisons, Cleveland Bulldogs, and Duluth Eskimos fold.
Detroit Wolverines enfranchised. Buffalo Bisons, Minneapolis Red Jackets, Orange Tornadoes, and Staten Island Stapletons enfranchised.
Detroit Wolverines and New York Yankees fold.
Pottsville Maroons relocate as Boston Bulldogs. Boston Bulldogs and Buffalo Bisons fold.
Dayton Triangles relocate as Brooklyn Dodgers.
Orange Tornadoes relocate as Newark Tornadoes.
Portsmouth Spartans enfranchised. Cleveland Indians enfranchised.
Minneapolis Red Jackets and Newark Tornadoes fold.
Frankford Yellow Jackets fold on October 26. Boston Braves enfranchised.
Cleveland Indians and Providence Steam Roller fold. Realigned into Eastern and Western divisions.
Boston Braves renamed Boston Redskins.
Cincinnati Reds, Philadelphia Eagles, and Pittsburgh Pirates enfranchised.
Staten Island Stapletons fold.
Eastern Division Western Division
Boston Redskins
Chicago Bears
Brooklyn Dodgers
Chicago Cardinals
New York Giants
Cincinnati Reds
Philadelphia Eagles
Green Bay Packers
Pittsburgh Pirates
Portsmouth Spartans
Portsmouth Spartans relocate as Detroit Lions.
Cincinnati Reds fold on November 6.
St. Louis Gunners enfranchised in Western Division on November 6. Boston Redskins relocate as Washington Redskins.
Cleveland Rams enfranchised in Western Division. Pittsburgh Pirates renamed Pittsburgh Steelers. Cleveland Rams suspended.
Philadelphia Eagles and Pittsburgh Steelers temporarily merge as Phil-Pitt Combine. Brooklyn Dodgers renamed Brooklyn Tigers.
Phil-Pitt Combine dissolves into Philadelphia Eagles in Eastern Division, and Pittsburgh Steelers.
Chicago Cardinals and Pittsburgh Steelers temporarily merge as Card-Pitt Combine in Western Division.
Cleveland Rams return from suspension in Western Division. Boston Yanks and Brooklyn Tigers temporarily merge as Boston Yanks.
Card-Pitt Combine dissolves into Chicago Cardinals in Western Division, and Pittsburgh Steelers in Eastern Division. Boston Yanks dissolve into Boston Yanks in Eastern Division, and Brooklyn Tigers.
Brooklyn Tigers fold.
Cleveland Rams relocate as Los Angeles Rams. Boston Yanks fold.
New York Bulldogs enfranchised in Eastern Division. Realigned into American and National conferences.
Baltimore Colts, Cleveland Browns, and San Francisco 49ers moved from All-America Football Conference.
New York Bulldogs renamed New York Yanks.
American Conference National Conference
Chicago Cardinals
Baltimore Colts
Cleveland Browns
Chicago Bears
New York Giants
Detroit Lions
Philadelphia Eagles
Green Bay Packers
Pittsburgh Steelers
Los Angeles Rams
Washington Redskins
New York Yanks
San Francisco 49ers
Dallas Texans enfranchised in National Conference.
New York Yanks fold. Realigned into Eastern and Western conferences.
Baltimore Colts enfranchised.
Dallas Texans fold.
Eastern Conference Western Conference
Chicago Cardinals
Baltimore Colts
Cleveland Browns
Chicago Bears
New York Giants
Detroit Lions
Philadelphia Eagles
Green Bay Packers
Pittsburgh Steelers
Los Angeles Rams
Washington Redskins
San Francisco 49ers
Chicago Cardinals relocate as St. Louis Cardinals.
Dallas Cowboys enfranchised in Western Conference. Dallas Cowboys moved to Eastern Conference.
Minnesota Vikings enfranchised in Western Conference. Atlanta Falcons enfranchised in Eastern Conference. Eastern Conference realigned into Capitol and Century divisions.
Western Conference realigned into Central and Coastal divisions.
New Orleans Saints enfranchised.
Eastern Conference
Capitol Division Century Division
Dallas Cowboys
Cleveland Browns
New Orleans Saints
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
Washington Redskins
St. Louis Cardinals
Western Conference
Central Division Coastal Division
Chicago Bears
Atlanta Falcons
Detroit Lions
Baltimore Colts
Green Bay Packers
Los Angeles Rams
Minnesota Vikings
San Francisco 49ers
New Orleans Saints moved to Century Division.
New York Giants moved to Capitol Division. New Orleans Sainst moved to Capitol Division.
New York Giants moved to Century Division. Realigned into American Football and National Football conferences.
American Football Conference aligned into Central, Eastern, and Western divisions.
National Football Conference aligned into Central, Eastern, and Western divisions.
Boston Patriots, Buffalo Bills, Houston Oilers, Miami Dolphins, and New York Jets moved from American Football League Eastern Division.
Cincinnati Bengals, Denver Broncos, Kansas City Chiefs, Oakland Raiders, and San Diego Padres moved from American Football League Western Division.
American Football Conference
Central Division Eastern Division Western Division
Cincinnati Bengals
Baltimore Colts
Denver Broncos
Cleveland Browns
Boston Patriots
Kansas City Chiefs
Houston Oilers
Buffalo Bills
Oakland Raiders
Pittsburgh Steelers
Miami Dolphins
San Diego Chargers
New York Jets
National Football Conference
Central Division Eastern Division Western Division
Chicago Bears
Dallas Cowboys
Atlanta Falcons
Detroit Lions
New York Giants
Los Angeles Rams
Green Bay Packers
Philadelphia Eagles
New Orleans Saints
Minnesota Vikings
St. Louis Cardinals
San Francisco 49ers
Washington Redskins
Boston Patriots renamed New England Patriots. Seattle Seahawks enfranchised in National Football Conference Western Division.
Tampa Bay Buccaneers enfranchised in American Football Conference Western Division. Seattle Seahawks moved to American Football Conference Western Division.
Tampa Bay Buccaneers moved to National Football Conference Central Division. Oakland Raiders relocate as Los Angeles Raiders. Baltimore Colts relocate as Indianapolis Colts. St. Louis Cardinals relocate as Phoenix Cardinals. Phoenix Cardinals renamed Arizona Cardinals. Carolina Panthers enfranchised in National Football Conference Western Division.
Jacksonville Jaguars enfranchised in American Football Conference Central Division.
Los Angeles Raiders relocate as Oakland Raiders.
Los Angeles Rams relocate as St. Louis Rams. Baltimore Ravens enfranchised in American Football Conference Central Division.
Cleveland Browns suspended. Houston Oilers relocate as Tennessee Oilers. Cleveland Browns return from suspension in American Football Conference Central Division.
Tennessee Oilers renamed Tennessee Titans. American Football Conference realigned into Eastern, Northern, Southern, and Western divisions.
National Football Conference realigned into Eastern, Northern, Southern, and Western divisions.
Houston Texans enfranchised.
American Football Conference
Eastern Division Northern Division Southern Division Western Division
Buffalo Bills
Baltimore Ravens
Houston Texans
Denver Broncos
Miami Dolphins
Cincinnati Bengals
Indinapolis Colts
Kansas City Chiefs
New England Patriots
Cleveland Browns
Jacksonville Jaguars
Oakland Raiders
New York Jets
Pittsburgh Steelers
Tennessee Titans
San Diego Chargers
National Football Conference
Eastern Division Northern Division Southern Division Western Division
Dallas Cowboys
Chicago Bears
Atlanta Falcons
Arizona Cardinals
New York Giants
Detroit Lions
Carolina Panthers
St. Louis Rams
Philadelphia Eagles
Green Bay Packers
New Orleans Saints
San Francisco 49ers
Washington Redskins
Minnesota Vikings
Tampa Bay Buccaneers
Seattle Seahawks
National Hockey League [ edit ] National Hockey League founded.
Aligned into single table.
Montreal Canadiens
Montreal Wanderers
Ottawa Senators
Toronto Hockey Club
Montreal Wanderers fold on January 2, 1918.
Toronto Hockey Club renamed Toronto Arenas. Quebec Athletics enfranchised.
Toronto Arenas renamed Toronto St. Patricks. Quebec Athletics relocate as Hamilton Tigers. Boston Bruins and Montreal Maroons enfranchised. Hamilton Tigers fold.
New York Americans and Pittsburgh Pirates fold. Realigned into American and Canadian divisions.
Chicago Black Hawks, Detroit Cougars, and New York Americans enfranchised.
American Division Canadian Division
Boston Bruins
Montreal Canadiens
Chicago Black Hawks
Montreal Maroons
Detroit Cougars
New York Americans
New York Rangers
Ottawa Senators
Pittsburgh Pirates
Toronto St. Patricks
Toronto St. Patricks renamed Toronto Maple Leafs. Detroit Cougars renamed Detroit Falcons.
Pittsburgh Pirates relocate as Philadelphia Quakers. Ottawa Senators suspended.
Philadelphia Quakers fold. Detroit Falcons renamed Detroit Red Wings.
Ottawa Senators return from suspension in Canadian Division. Ottawa Senators relocate as St. Louis Eagles. Realigned into single table.
Montreal Maroons fold.
Boston Bruins
Chicago Black Hawks
Detroit Red Wings
Montreal Canadiens
New York Americans
New York Rangers
Toronto Maple Leafs
New York Americans renamed Brooklyn Americans. Realigned into Eastern and Western divisions.
Los Angeles Kings, Minnesota North Stars, California Seals, Philadelphia Flyers, Pittsburgh Penguins, and St. Louis Blues enfranchised.
Eastern Division Western Division
Boston Bruins
California Seals
Chicago Black Hawks
Los Angeles Kings
Detroit Red Wings
Minnesota North Stars
Montreal Canadiens
Philadelphia Flyers
New York Rangers
Pittsburgh Penguins
Toronto Maple Leafs
St. Louis Blues
California Seals renamed Oakland Seals on November 6. Buffalo Sabres and Vancouver Canucks enfranchised in Eastern Division.
Chicago Black Hawks moved to Western Division.
Oakland Seals renamed California Golden Seals. Atlanta Flames enfranchised in Western Division.
New York Islanders enfranchised in Eastern Division. Realigned into Clarence Campbell and Prince of Wales conferences.
Clarence Campbell Conference aligned into Patrick and Smythe divisions.
Prince of Wales Conference aligned into Adams and Norris divisions.
Kansas City Scouts and Washington Capitals enfranchised.
Clarence Campbell Conference
Patrick Division Smythe Division
Atlanta Flames
Chicago Black Hawks
New York Islanders
Kansas City Scouts
New York Rangers
Minnesota North Stars
Philadelphia Flyers
St. Louis Blues
Vancouver Canucks
Prince of Wales Conference
Adams Division
Norris Division
Boston Bruins
Detroit Red Wings
Buffalo Sabres
Los Angeles Kings
California Golden Seals
Montreal Canadiens
Toronto Maple Leafs
Pittsburgh Penguins
Washington Capitals
California Golden Seals relocate as Cleveland Barons.
Kansas City Scouts relocate as Colorado Rockies. Cleveland Barons and Minnesota North Stars merge as Minnesota North Stars in Adams Division. Edmonton Oilers and Winnipeg Jets moved to Smythe Division from World Hockey Association.
Hartford Whalers moved to Norris Division from World Hockey Association.
Quebec Nordiques moved to Adams Division from World Hockey Association.
Washington Capitals moved to Patrick Division. Atlanta Flames relocate as Calgary Flames. Clarence Campbell Conference realigned into Norris and Smythe divisions.
Prince of Wales Conference realigned into Adams and Patrick divisions.
Clarence Campbell Conference
Norris Division Smythe Division
Chicago Black Hawks
Calgary Flames
Detroit Red Wings
Colorado Rockies
Minnesota North Stars
Edmonton Oilers
St. Louis Blues
Los Angeles Kings
Toronto Maple Leafs
Vancouver Canucks
Winnipeg Jets
Prince of Wales Conference
Adams Division Patrick Division
Boston Bruins
New York Islanders
Buffalo Sabres
New York Rangers
Hartford Whalers
Philadelphia Flyers
Montreal Canadiens
Pittsburgh Penguins
Quebec Nordiques
Washington Capitals
Colorado Rockies relocate as New Jersey Devils and moved to Patrick Division.
Winnipeg Jets moved to Smythe Division. Chicago Black Hawks renamed Chicago Blackhawks. San Jose Sharks enfranchised in Smythe Division. Ottawa Senators enfranchised in Adams Division.
Tampa Bay Lightning enfranchised in Norris Division. Realigned into Eastern and Western conferences.
Eastern Conference aligned into Atlantic and Northeastern divisions.
Western Conference aligned into Central and Pacific divisions.
Florida Panthers and Mighty Ducks on Anaheim enfranchised.
Minnesota North Stars relocate as Dallas Stars.
Eastern Conference
Atlantic Division Northeastern Division
Florida Panthers
Boston Bruins
New Jersey Devils
Buffalo Sabres
New York Islanders
Hartford Whalers
New York Rangers
Montreal Canadiens
Philadelphia Flyers
Ottawa Senators
Tampa Bay Lightning
Pittsburgh Penguins
Washington Capitals
Quebec Nordiques
Western Conference
Central Division Pacific Division
Chicago Blackhawks
Calgary Flames
Dallas Stars
Edmonton Oilers
Detroit Red Wings
Los Angeles Kings
St. Louis Blues
Mighty Ducks of Anaheim
Toronto Maple Leafs
San Jose Sharks
Winnipeg Jets
Vancouver Canucks
Quebec Nordiques relocate as Colorado Avalanche and moved to Pacific Division. Winnipeg Jets relocate as Phoenix Coyotes. Hartford Whalers relocate as Carolina Hurricanes. Eastern Conference realigned into Atlantic, Northeastern, and Southeastern divisions.
Western Conference realigned into Central, Northwestern, and Pacific divisions.
Nashville Predators enfranchised.
Eastern Conference
Atlantic Division Northeastern Division Southeastern Division
New Jersey Devils
Boston Bruins
Carolina Hurricanes
New York Islanders
Buffalo Sabres
Florida Panthers
New York Rangers
Montreal Canadiens
Tampa Bay Lightning
Philadelphia Flyers
Ottawa Senators
Washington Capitals
Pittsburgh Penguins
Tampa Bay Lightning
Western Conference
Central Division Northwestern Division Pacific Division
Chicago Blackhawks
Calgary Flames
Dallas Stars
Detroit Red Wings
Colorado Avalanche
Los Angeles Kings
Nashville Predators
Edmonton Oilers
Mighty Ducks of Anaheim
St. Louis Blues
Vancouver Canucks
Phoenix Coyotes
San Jose Sharks
Atlanta Thrashers enfranchised in Southeastern Division. Columbus Blue Jackets enfranchised in Central Division.
Minnesota Wild enfranchised in Northwestern Division Returned from suspension. Mighty Ducks of Anaheim renamed Anaheim Ducks. Atlanta Thrashers relocate as Winnipeg Jets. Founded.
Aligned into Atlantic, Central, and Pacific divisions.
Atlantic Division Central Division Pacific Division
Boston Breakers
Birmingham Stallions
Arizona Wranglers
New Jersey Generals
Chicago Blitz
Denver Gold
Philadelphia Stars
Michigan Panthers
Los Angeles Express
Washington Federals
Tampa Bay Bandits
Oakland Invaders
Realigned into Eastern and Western conferences.
Eastern Conference aligned into Atlantic and Southern divisions.
Western Conference aligned into Central and Pacific divisions.
Arizona Wranglers relocate as Chicago Blitz.
Boston Breakers relocate as New Orleans Breakers.
Chicago Blitz relocate as Arizona Wranglers.
Houston Gamblers, Jacksonville Bulls, Memphis Showboats, Oklahoma Outlaws, Pittsburgh Maulers, and San Antonio Gunslingers enfranchised.
Eastern Conference
Atlantic Division Southern Division
New Jersey Generals
Birmingham Stallions
Philadelphia Stars
Jacksonville Bulls
Pittsburgh Maulers
Memphis Showboats
Washington Federals
New Orleans Breakers
Tampa Bay Bandits
Western Conference
Central Division Pacific Division
Chicago Blitz
Arizona Wranglers
Houston Gamblers
Denver Gold
Michigan Panthers
Los Angeles Express
Oklahoma Outlaws
Oakland Invaders
San Antonio Gunslingers
Eastern Conference realigned into single table.
Western Conference realigned into single table.
Arizona Wranglers and Oklahoma Outlaws merge into Arizona Outlaws.
Michigan Panthers and Oakland Invaders merge into Oakland Invaders.
New Orleans Breakers relocate as Portland Breakers.
Philadelphia Stars relocate as Baltimore Stars.
Chicago Blitz and Pittsburgh Maulers fold.
Washington Federals relocate as Orlando Renegades.
Eastern Conference Western Conference
Baltimore Stars
Arizona Outlaws
Birmingham Stallions
Denver Gold
Jacksonville Bulls
Houston Gamblers
Memphis Showboats
Los Angeles Express
New Jersey Generals
Oakland Invaders
Orlando Renegades
Portland Breakers
San Antonio Gunslingers
Tampa Bay Bandits
World Football League founded.
Aligned into Central, Eastern, and Western divisions.
Central Division Eastern Division Western Division
Birmingham Americans
Florida Blazers
Houston Texans
Chicago Fire
Jacksonville Sharks
Portland Storm
Detroit Wheels
New York Stars
Southern California Sun
Memphis Southmen
Philadelphia Bell
The Hawaiians
Houston Texans relocate as Shreveport on September 18.
Shreveport renamed Shreveport Steamer on September 23.
New York Stars relocate as Charlotte Stars on September 25.
Charlotee Stars renamed Charlotte Hornets on October 4.
Detroit Wheels and Jacksonvilee Sharks fold on October 7. Realigned into Eastern and Western divisions.
Birmingham Americans renamed Birmingham Vulcans.
Chicago Fire renamed Chicago Winds.
Florida Blazers relocate as San Antonio Wings.
Jacksonville Express enfranchised.
Memphis Southmen renamed Memphis Grizzlies.
Portland Storm renamed Portland Thunder.
Eastern Division Western Division
Birmingham Vulcans
Chicago Winds
Charlotte Hornets
Portland Thunder
Jacksonville Express
San Antonio Wings
Memphis Southmen
Shreveport Steamer
Philadelphia Bell
Southern California Sun
The Hawaiians
XFL Founded.
Aligned into Eastern and Western divisions.
Eastern Division Western Division
Birmingham Thunderbolts
Las Vegas Outlaws
Chicago Enforcers
Los Angeles Xtreme
New York/New Jersey Hitmen
Memphis Maniax
Orlando Rage
San Francisco Demons
