• The Pittsburgh Pirates Changed their name to the Pittsburgh Steelers.

1943

• The Cleveland Rams suspend operations for the 1943 season.
• The Philadelphia Eagles and Pittsburgh Steelers merge for one season.

1944

• The Chicago Cardinals and Pittsburgh Steelers merge for one season.

1944

• The Brooklyn Dodgers changed their name to the Brooklyn Tigers.
• The Boston Yanks are granted an NFL franchise and added to the Eastern Division.

1945

• The Brooklyn Tigers and the Boston Yanks merge for one season.

1946

• The Cleveland Rams moved to Los Angeles.
• The Brooklyn team was officially disbanded.

1949

• The Boston Yanks moved to New York and changed their name to the New York Bulldogs.