Akron Pros
Canton Bulldogs
Chicago Cardinals
Cleveland Tigers
Dayton Triangles
Decatur Staleys
Hammond Pros
Muncie Flyers
Rochester Jeffersons
Rock Island Independents
The Buffalo All-Americans, Chicago Tigers, Columbus Panhandles, and Detroit Heralds are usually included in APFA standings for 1920 because they played several games against league teams.

1921

Chicago Tigers folded
Decatur Staleys became Chicago Staleys
Cincinnati Celts, Evansville Crimson Giants, Green Bay Packers, Louisville Brecks, Minneapolis Marines, New York Giants, Tonawanda Kardex (or Lumbermen), and Washington Senators added

1922

The APFA became the National Football League
The Chicago Staleys became the Chicago Bears
Cincinnati Celts, Cleveland Tigers, Detroit Heralds, Muncie Flyers, New York Giants, Tonawanda Kardex and Washington Senators folded
Milwaukee Badgers, Oorang Indians (of Marion, OH), Racine Legion, and Toledo Maroons added

1923

Columbus Panhandles became the Columbus Tigers
Evansville Crimson Giants folded
Cleveland Indians, Duluth Kelleys, and St. Louis All-Stars added

1924

Buffalo All-Americans became Buffalo Bisons
Toledo Maroons became the Kenosha Maroons
Racine Legion franchise became inactive for two seasons
Cleveland Indians and Canton Bulldogs merged as the Cleveland Bulldogs
Louisville Brecks, Oorang Indians, St. Louis All-Stars and folded
Frankford Yellow Jackets and Kansas City Blues added

1925

Kansas City Blues became the Kansas City Cowboys
Columbus Tigers, Kenosha Maroons, and Minneapolis Marines folded
Canton Bulldogs re-joined
Detroit Panthers, New York Giants, Providence Steam Roller, and Pottsville Maroons added

1926

Akron Pros/Indians became the Akron Indians
Buffalo Bisons became the Buffalo Rangers
Duluth Kelleys became the Duluth Eskimos
Cleveland Bulldogs and Rochester Jeffersons folded
Racine Legion resumed play as the Racine Tornadoes
Rock Island Independents left for the American Football League
Brooklyn Lions, Hartford Blues, Los Angeles Buccaneers, and Louisville Colonels added

1927

Akron Pros/Indians, Brooklyn Lions, Canton Bulldogs, Columbus Tigers, Detroit Panthers, Hammond Pros, Hartford Blues, Kansas City Cowboys, Los Los Angeles Buccaneers, Louisville Colonels, Milwaukee Badgers, and Racine Tornadoes folded
Cleveland Bulldogs and New York Yankees added

1928

Buffalo Bisons were inactive for season
Cleveland Bulldogs folded
Duluth Eskimos franchise was inactive for season
Detroit Wolverines added

1929

New York Yankees folded
Pottsville Maroons became the Boston Bulldogs
Duluth Eskimos franchise sold to Orange Tornadoes
Buffalo Bisons resumed play for one season
Minneapolis Marines, and Staten Island Stapletons added

1930

Orange Tornadoes became Newark Tornadoes
Boston Bulldogs, and Buffalo Bisons folded
Dayton Triangles became the Brooklyn Dodgers
Portsmouth Spartans added

1931

Minneapolis Marines and Newark Tornadoes folded
Frankford Yellow Jackets folded during the season
Cleveland Indians joined

1932

Cleveland Indians and Providence Steam Roller folded
Boston Braves added

1933

Boston Braves became the Boston Redskins
Staten Island Stapletons folded
Cincinnati Reds, Philadelphia Eagles, and Pittsburgh Pirates added

1934

Portsmouth Spartans became the Detroit Lions
Cincinnati Reds were replaced by the St. Louis Gunners during the season

1937

St. Louis Gunners folded
Boston Redskins became the Washington Redskins
Cleveland Rams added

1941

Pittsburgh Pirates became Pittsburgh Steelers

1943

Cleveland Rams suspended operations for one season
Eagles and Steelers merged as the Phil-Pitt Steagles for one season

1944

Cardinals and Steelers merged as Card-Pitt for one season
Brooklyn Dodgers became the Brooklyn Tigers
Boston Yanks added

1945

Brooklyn Tigers and Boston Yanks merged for one season

1946

Cleveland Rams moved to Los Angeles
Brooklyn Tigers folded

1949

Boston Yanks became New York Bulldogs

1950

New York Bulldogs became New York Yanks
The All-America Football Conference folded; the Cleveland Browns, San Francisco 49ers and Baltimore Colts joined the NFL for the 1950 season

1951

Baltimore Colts folded

1952

New York Yanks folded, were replaced by the Dallas Texans

1953

Dallas Texans folded, were replaced by the Baltimore Colts

1960

Dallas Cowboys added
Chicago Cardinals moved to St. Louis

1961

Minnesota Vikings added

1966

Atlanta Falcons added

1967

New Orleans Saints added

1970

The Boston Patriots, Buffalo Bills, Cincinnati Bengals, Houston Oilers, Kansas City Chiefs, Miami Dolphins, New York Jets, Oakland Raiders, and San Diego Chargers entered the NFL in the merger with the AFL

1971

Boston Patriots became the New England Patriots

1976

Seattle Seahawks and Tampa Bay Buccaneers added

1982

Oakland Raiders moved to Los Angeles

1984

Baltimore Colts moved to Indianapolis

1988

The St. Louis Cardinals moved to Phoenix

1994

Phoenix Cardinals renamed the Arizona Cardinals

1995

Carolina Panthers and Jacksonville Jaguars added
Los Angeles Rams moved to St. Louis
Los Angeles Raiders moved back to Oakland

1996

Cleveland Browns became the Baltimore Ravens

1997

Houston Oilers moved to Memphis and became the Tennessee Oilers

1998

Tennessee Oilers moved from Memphis to Nashville

1999

Tennessee Oilers became the Titans
New Cleveland Browns franchise added

2002

Houston Texans added

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Genealogy of Current Members

Arizona Cardinals

Entered the APFA in 1920 as the Chicago Cardinals, became the St. Louis Cardinals in 1960, the Phoenix Cardinals in 1988, the Arizona Cardinals in 1994

Atlanta Falcons

Entered the NFL in 1966

Baltimore Ravens

Entered the AAFC as the Cleveland Browns in 1946, moved into the NFL in 1950, became the Baltimore Ravens in 1997

Buffalo Bills

Entered the AFL in 1960, moved into the NFL in 1970

Carolina Panthers

Entered the NFL in 1995

Chicago Bears

Entered the APFA in 1920 as the Decatur Staleys, became the Chicago Staleys in 1921 and the Bears in 1922

Cincinnati Bengals

Entered the AFL in 1968, moved into the NFL in 1970

Cleveland Browns

Entered the NFL in 1999

Dallas Cowboys

Entered the NFL in 1960

Denver Broncos

Entered the AFL in 1960, moved into the NFL in 1970

Detroit Lions

Entered the NFL as the Portsmouth, Ohio, Spartans in 1930, became the Detroit Lions in 1934

Green Bay Packers

Entered the APFA in 1921

Houston Texans

Entered the NFL in 2002

Indianapolis Colts

Entered the NFL as the Baltimore Colts in 1953, the Indianapolis Colts in 1984

Jacksonville Jaguars

Entered the NFL in 1995

Kansas City Chiefs

Entered the AFL as the Dallas Texans in 1960, became the Kansas City Chiefs in 1963, moved into the NFL in 1970

Miami Dolphins

Entered the AFL in 1966, moved into the NFL in 1970

Minnesota Vikings

Entered the NFL in 1961

New England Patriots

Entered the AFL as the Boston Patriots in 1960, moved into the NFL in 1970, became the New England Patriots in 1971

New Orleans Saints

Entered the NFL in 1967

New York Giants

Entered the NFL in 1925

New York Jets

Entered the AFL as the New York Titans in 1960, became the New York Jets in 1963, moved into the NFL in 1970

Oakland Raiders

Entered the AFL in 1960, moved into the NFL in 1970, became the Los Angeles Raiders in 1982, moved back to Oakland in 1995

Philadelphia Eagles

Entered the NFL in 1933

Pittsburgh Steelers

Entered the NFL in 1933 as the Pittsburgh Pirates, became the Steelers in 1941

St. Louis Rams

Entered the NFL in 1937 as the Cleveland Rams, became the Los Angeles Rams in 1946, the St. Louis Rams in 1995

San Diego Chargers

Entered the AFL as the Los Angeles Chargers in 1960, became the San Diego Chargers in 1961, moved into the NFL in 1970

San Francisco 49ers

Entered the AAFC in 1946, moved into the NFL in 1950

Seattle Seahawks

Entered the NFL in 1976

Tampa Bay Buccaneers

Entered the NFL in 1976

Tennessee Titans

Entered the AFL as the Houston Oilers in 1960, joined the NFL in 1970, moved to Memphis and became the Tennessee Oilers in 1997, moved to Nashville in 1998, became the Tennessee Titans in 1999

Washington Redskins

Entered the NFL in 1932 as the Boston Braves, became the Boston Redskins in 1933, the Washington Redskins in 1937

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