• The Orange Tornadoes changed their name to the Newark Tornadoes.

The following teams joined the NFL for the 1930 season:
• Brooklyn Dodgers
• Portsmouth Spartans

The following teams folded after the 1930 season:
• Minneapolis Red Jackets
• Newark Tornadoes

1931

• The Cleveland Indians joined the NFL.

The following teams folded after the 1931 season:
• Cleveland Indians
• Providence Steam Roller

1932

• The Boston Braves joined the NFL.
• The Frankford Yellow Jackets disbanded during the season.
• The Staten Island Stapletons folded after the season.

1933

• The Boston Braves changed their name to the Boston Redskins.

The following teams joined the NFL for the 1933 season:
• Cincinnati Reds
• Philadelphia Eagles
• Pittsburgh Pirates

1934

The NFL splits into two divisions:

Eastern Division
• Boston Redskins
• Brooklyn Dodgers
• New York Giants
• Philadelphia Eagles
• Pittsburgh Pirates

Western Division
• Chicago Bears
• Chicago Cardinals
• Cincinnati Reds
• Green Bay Packers
• Portsmouth Spartans

• The Portsmouth Spartans move to Detroit and change their name to the Detroit Lions.
• The Cincinnati Reds move to St. Louis and change their name to the St. Louis Gunners.

1937

• The Cleveland Rams are awarded an NFL franchise in the Western Division.
• The Boston Redskins move to Washington.