List of NFL teams per season

1920 season (as American Professional Football Association)

Akron Pros(8-3-0)
Buffalo All-Americans(9-1-1)
Canton Bulldogs(7-4-2)
Chicago Cardinals(6-2-2)
Chicago Tigers(2-5-1)
Cleveland Tigers(2-4-2)
Columbus Pandhandles(2-6-2)
Dayton Triangles(5-2-2)
Decatur Staleys(10-1-2)
Detroit Heralds(2-3-3)
Hammond Pros(2-5-0)
Muncie Flyers(0-1-0)
Rochester Jeffersons(6-3-2)
Rock Island Independents(6-2-2)
1921 season (as APFA)

Akron Pros(8-3-1)
Buffalo All-Americans(9-1-2)
Canton Bulldogs(5-2-3)
Chicago Cardinals(3-3-2)
Chicago Staleys(9-1-1) (moved from Decatur)
Cincinnati Celts(1-3-0)
Cleveland Indians(3-5-0) (formerly Tigers)
Columbus Pandhandles(1-8-0)
Dayton Triangles(4-4-1)
Detroit Tigers(1-5-1) (formerly Heralds)
Evansville Crimson Giants(3-2-0)
Green Bay Packers(3-2-1)
Hammond Pros(1-3-1)
Louisville Brecks(0-2-0)
Minneapolis Marines(1-3-0)
Muncie Flyers(0-2-0)
New York Brickley Giants0-2-0)
Rochester Jeffersons(2-3-0)
Rock Island Independents(4-2-1)
Tonawanda Kardex(0-1-0)
Washington Senators(1-2-0)
1922 season (first season as National Football League)

Akron Pros(3-5-2)
Buffalo All-Americans(5-4-1)
Canton Bulldogs(10-0-2)
Chicago Bears(9-3-0) (formerly Staleys)
Chicago Cardinals(8-3-0)
Columbus Pandhandles(0-8-0)
Dayton Triangles(4-3-1)
Evansville Crimson Giants(0-3-0)
Green Bay Packers(4-3-3)
Hammond Pros(0-5-1)
Louisville Brecks(1-3-0)
Milwaukee Badgers(2-4-3)
Minneapolis Marines(1-3-0)
Oorang Indians(3-6-0)
Racine Legion(6-4-1)
Rochester Jeffersons(0-4-1)
Rock Island Independents(4-2-1)
Toledo Maroons5-2-2)
1923 season

Akron Indians(1-6-0) (formerly Pros)
Buffalo All-Americans(5-4-3)
Canton Bulldogs(11-0-1)
Chicago Bears(9-2-1)
Chicago Cardinals(8-4-0)
Cleveland Indians3-1-3)
Columbus Tigers(5-4-1) (formerly Pandhandlers)
Dayton Triangles1-6-1)
Duluth Kelleys4-3-0)
Green Bay Packers7-2-1)
Hammond Pros(1-5-1)
Louisville Brecks(0-3-0)
Milwaukee Badgers(7-2-3)
Minneapolis Marines(2-5-2)
Oorang Indians(1-10-0)
Racine Legion(4-4-2)
Rochester Jeffersons(0-4-0)
Rock Island Independents(2-3-3)
St. Louis All Stars(1-4-2)
Toledo Maroons(3-3-2)
1924 season

Akron Indians(2-6-0)
Buffalo Bisons(6-5-0) (formerly All-Americans)
Chicago Bears(6-1-4)
Chicago Cardinals(5-4-1)
Cleveland Bulldogs(7-1-1)
Columbus Tigers(4-4-0)
Dayton Triangles(2-6-0)
Duluth Kelleys5-1-0)
Frankford Yellow Jackets(11-2-1)
Green Bay Packers(7-4-0)
Hammond Pros(2-2-1)
Kansas City Blues(2-7-0)
Kenosha Maroons(0-4-1)
Milwaukee Badgers(5-8-0)
Minneapolis Marines(0-6-0)
Racine Legion(4-3-3)
Rochester Jeffersons(0-7-0)
Rock Island Independents(5-2-2)
1925 season

Akron Pros
Buffalo Bisons
Chicago Bears
Chicago Cardinals
Canton Bulldogs
Cleveland Bulldogs
Columbus Tigers
Dayton Triangles
Detroit Panthers (formerly Tigers)
Duluth Kelleys
Frankford Yellow Jackets
Green Bay Packers
Hammond Pros
Kansas City Cowboys (formerly Blues)
Milwaukee Badgers
Minneapolis Marines
New York Giants
Pottsville Maroons
Providence Steam Roller
Racine Legion
Rochester Jeffersons
Rock Island Independents
1926 season

Akron Indians (formerly Pros)
Brooklyn Lions
Buffalo Rangers (formerly Bisons)
Chicago Bears
Chicago Cardinals
Canton Bulldogs
Cleveland Bulldogs
Columbus Tigers
Dayton Triangles
Detroit Panthers
Duluth Eskimos (formerly Kelleys)
Frankford Yellow Jackets
Green Bay Packers
Hammond Pros
Hartford Blues
Kansas City Cowboys
Los Angeles Buccaneers
Louisville Colonels
Milwaukee Badgers
New York Giants
Pottsville Maroons
Providence Steam Roller
Racine Tornadoes (formerly Legion)
1927 season

Buffalo Bisons (formerly Rangers)
Chicago Bears
Chicago Cardinals
Cleveland Bulldogs
Dayton Triangles
Duluth Eskimos
Frankford Yellow Jackets
Green Bay Packers
New York Giants
New York Yankees
Pottsville Maroons
Providence Steam Roller
1928 season

Chicago Bears
Chicago Cardinals
Dayton Triangles
Detroit Wolverines
Frankford Yellow Jackets
Green Bay Packers
New York Giants
New York Yankees
Pottsville Maroons
Providence Steam Roller
1929 season

Boston Bulldogs (formerly Pottsville Maroons)
Chicago Bears
Chicago Cardinals
Dayton Triangles
Detroit Wolverines
Frankford Yellow Jackets
Green Bay Packers
Minneapolis Red Jackets (formerly Marines)
New York Giants
New York Yankees
Orange Tornadoes
Providence Steam Roller
Staten Island Stapletons
1930 season

Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Frankford Yellow Jackets
Green Bay Packers
Minneapolis Red Jackets
Newark Tornadoes (formerly Orange Tornadoes)
New York Giants
Portsmouth Spartans
Providence Steam Roller
Staten Island Stapletons
1931 season

Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Cleveland Indians
Frankford Yellow Jackets
Green Bay Packers
New York Giants
Portsmouth Spartans
Providence Steam Roller
Staten Island Stapletons
1932 season

Boston Braves
Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Green Bay Packers
New York Giants
Portsmouth Spartans
Staten Island Stapletons
1933 season

Boston Redskins (formerly Braves)
Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Cincinatti Reds
Green Bay Packers
New York Giants
Philadelphia Eagles (formerly Frankford Yellow Jackets)
Pittsburgh Pirates
Portsmouth Spartans
1934 season

Boston Redskins
Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Cincinatti Reds
Detroit Lions (formerly Portsmouth Spartans)
Green Bay Packers
New York Giants
Philadelphia Eagles
Pittsburgh Pirates
St. Louis Gunners
1935-36 seasons

Boston Redskins
Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Detroit Lions
Green Bay Packers
New York Giants
Philadelphia Eagles
Pittsburgh Pirates
1937-39 seasons

Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Cleveland Rams
Detroit Lions
Green Bay Packers
New York Giants
Philadelphia Eagles
Pittsburgh Pirates
Washington Redskins (moved from Boston)
1940-42 seasons

Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Cleveland Rams
Detroit Lions
Green Bay Packers
New York Giants
Philadelphia Eagles
Pittsburgh Steelers (formerly Pirates)
Washington Redskins
1943 season

Brooklyn Dodgers
Chicago Bears
Chicago Cardinals
Detroit Lions
Green Bay Packers
New York Giants
Philadelphia Eagles - Pittsburgh Steelers "Phil-Pitt"
Washington Redskins
1944 season

Boston Yanks
Brooklyn Tigers (formerly Dodgers)
Chicago Bears
Cleveland Rams
Detroit Lions
Green Bay Packers
New York Giants
Philadelphia Eagles
Pittsburgh Steelers - Chicago Cardinals "Card-Pitt"
Washington Redskins
1945 season

Boston Yanks
Chicago Bears
Chicago Cardinals
Cleveland Rams
Detroit Lions
Green Bay Packers
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
Washington Redskins
1946-48 seasons

Boston Yanks
Chicago Bears
Chicago Cardinals
Detroit Lions
Green Bay Packers
Los Angeles Rams (moved from Cleveland)
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
Washington Redskins
1949 season

Chicago Bears
Chicago Cardinals
Detroit Lions
Green Bay Packers
Los Angeles Rams
New York Bulldogs (formerly Boston Yanks)
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
Washington Redskins
1950 season

Baltimore Colts (All America Football Conference merger)
Chicago Bears
Chicago Cardinals
Cleveland Browns (AAFC merger)
Detroit Lions
Green Bay Packers
Los Angeles Rams
New York Giants
New York Yanks (formerly Bulldogs)
Philadelphia Eagles
Pittsburgh Steelers
San Francisco 49ers (AAFC merger)
Washington Redskins
1951 season

Chicago Bears
Chicago Cardinals
Cleveland Browns
Detroit Lions
Green Bay Packers
Los Angeles Rams
New York Giants
New York Yanks
Philadelphia Eagles
Pittsburgh Steelers
San Francisco 49ers
Washington Redskins
1952 season

Chicago Bears
Chicago Cardinals
Cleveland Browns
Dallas Texans
Detroit Lions
Green Bay Packers
Los Angeles Rams
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
San Francisco 49ers
Washington Redskins
1953-59 seasons

Baltimore Colts
Chicago Bears
Chicago Cardinals
Cleveland Browns
Detroit Lions
Green Bay Packers
Los Angeles Rams
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
San Francisco 49ers
Washington Redskins
1960 season

Baltimore Colts
Chicago Bears
Cleveland Browns
Dallas Cowboys (expansion)
Detroit Lions
Green Bay Packers
Los Angeles Rams
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
San Francisco 49ers
St. Louis Cardinals (moved from Chicago)
Washington Redskins
1961-65 seasons

Baltimore Colts
Chicago Bears
Cleveland Browns
Dallas Cowboys
Detroit Lions
Green Bay Packers
Los Angeles Rams
Minnesota Vikings (expansion)
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
San Francisco 49ers
St. Louis Cardinals
Washington Redskins
1966 season

Atlanta Falcons (expansion)
Baltimore Colts
Chicago Bears
Cleveland Browns
Dallas Cowboys
Detroit Lions
Green Bay Packers
Los Angeles Rams
Minnesota Vikings
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
San Francisco 49ers
St Louis Cardinals
Washington Redskins
1967-69 seasons

Atlanta Falcons
Baltimore Colts
Chicago Bears
Cleveland Browns
Dallas Cowboys
Detroit Lions
Green Bay Packers
Los Angeles Rams
Minnesota Vikings
New Orleans Saints (expansion)
New York Giants
Philadelphia Eagles
Pittsburgh Steelers
San Francisco 49ers
St Louis Cardinals
Washington Redskins
1970-71 seasons

Atlanta Falcons
Baltimore Colts
Boston Patriots (American Football League merger)
Buffalo Bills (AFL)
Chicago Bears
Cincinatti Bengals (AFL)
Cleveland Browns
Dallas Cowboys
Denver Broncos (AFL)
Detroit Lions
Green Bay Packers
Houston Oilers (AFL)
Kansas City Chiefs (AFL)
Los Angeles Rams
Miami Dolphins (AFL)
Minnesota Vikings
New Orleans Saints
New York Giants
New York Jets (AFL)
Oakland Raiders (AFL)
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers (AFL)
San Francisco 49ers
St Louis Cardinals
Washington Redskins
1972-75 seasons

Atlanta Falcons
Baltimore Colts
Buffalo Bills
Chicago Bears
Cincinatti Bengals
Cleveland Browns
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Oilers
Kansas City Chiefs
Los Angeles Rams
Miami Dolphins
Minnesota Vikings
New England Patriots (formerly Boston Patriots)
New Orleans Saints
New York Giants
New York Jets
Oakland Raiders
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
St Louis Cardinals
Washington Redskins
1976-81 seasons

Atlanta Falcons
Baltimore Colts
Buffalo Bills
Chicago Bears
Cincinatti Bengals
Cleveland Browns
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Oilers
Kansas City Chiefs
Los Angeles Rams
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Oakland Raiders
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks (expansion)
St Louis Cardinals
Tampa Bay Buccaneers (expansion)
Washington Redskins
1982-83 seasons

Atlanta Falcons
Baltimore Colts
Buffalo Bills
Chicago Bears
Cincinatti Bengals
Cleveland Browns
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Oilers
Kansas City Chiefs
Los Angeles Raiders (moved from Oakland)
Los Angeles Rams
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
St Louis Cardinals
Tampa Bay Buccaneers
Washington Redskins
1984-87 seasons

Atlanta Falcons
Buffalo Bills
Chicago Bears
Cincinatti Bengals
Cleveland Browns
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Oilers
Indianapolis Colts (moved from Baltimore)
Kansas City Chiefs
Los Angeles Raiders
Los Angeles Rams
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
St Louis Cardinals
Tampa Bay Buccaneers
Washington Redskins
1988-93 seasons

Atlanta Falcons
Buffalo Bills
Chicago Bears
Cincinatti Bengals
Cleveland Browns
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Oilers
Indianapolis Colts
Kansas City Chiefs
Los Angeles Raiders
Los Angeles Rams
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Philadelphia Eagles
Phoenix Cardinals (moved from St Louis)
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
Tampa Bay Buccaneers
Washington Redskins
1994 season

Arizona Cardinals (formerly Phoenix Cardinals)
Atlanta Falcons
Buffalo Bills
Chicago Bears
Cincinatti Bengals
Cleveland Browns
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Oilers
Indianapolis Colts
Kansas City Chiefs
Los Angeles Raiders
Los Angeles Rams
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
Tampa Bay Buccaneers
Washington Redskins
1995 season

Arizona Cardinals
Atlanta Falcons
Buffalo Bills
Carolina Panthers (expansion)
Chicago Bears
Cincinatti Bengals
Cleveland Browns
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Oilers
Indianapolis Colts
Jacksonville Jaguars (expansion)
Kansas City Chiefs
Los Angeles Raiders
Los Angeles Rams
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Oakland Raiders (moved from Los Angeles)
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
St Louis Rams (moved from Los Angeles)
Tampa Bay Buccaneers
Washington Redskins
1996 season

Arizona Cardinals
Atlanta Falcons
Baltimore Ravens (formerly Cleveland Browns)
Buffalo Bills
Carolina Panthers
Chicago Bears
Cincinatti Bengals
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Oilers
Indianapolis Colts
Jacksonville Jaguars
Kansas City Chiefs
Los Angeles Raiders
Los Angeles Rams
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Oakland Raiders
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
St Louis Rams
Tampa Bay Buccaneers
Washington Redskins
1997-98 seasons

Arizona Cardinals
Atlanta Falcons
Baltimore Ravens
Buffalo Bills
Carolina Panthers
Chicago Bears
Cincinatti Bengals
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Indianapolis Colts
Jacksonville Jaguars
Kansas City Chiefs
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Oakland Raiders
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
St Louis Rams
Tampa Bay Buccaneers
Tennessee Oilers (moved from Houston)
Washington Redskins
1999-2001 seasons

Arizona Cardinals
Atlanta Falcons
Baltimore Ravens
Buffalo Bills
Carolina Panthers
Chicago Bears
Cincinatti Bengals
Cleveland Browns (expansion)
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Indianapolis Colts
Jacksonville Jaguars
Kansas City Chiefs
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Oakland Raiders
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
St Louis Rams
Tampa Bay Buccaneers
Tennessee Titans (formerly Oilers)
Washington Redskins
2002 season to present

Arizona Cardinals
Atlanta Falcons
Baltimore Ravens
Buffalo Bills
Carolina Panthers
Chicago Bears
Cincinatti Bengals
Cleveland Browns
Dallas Cowboys
Denver Broncos
Detroit Lions
Green Bay Packers
Houston Texans (expansion)
Indianapolis Colts
Jacksonville Jaguars
Kansas City Chiefs
Miami Dolphins
Minnesota Vikings
New England Patriots
New Orleans Saints
New York Giants
New York Jets
Oakland Raiders
Philadelphia Eagles
Pittsburgh Steelers
San Diego Chargers
San Francisco 49ers
Seattle Seahawks
St Louis Rams
Tampa Bay Buccaneers
Tennessee Titans
Washington Redskins