Rules

Boston Yanks became the New York Bulldog

January 20, 1949 2

Major Rule Changes 1949

January 11, 1949 3

Los Angeles Rams debut first modern helmet emblems in pro football

September 22, 1948 2

Major Rule Changes 1948

January 14, 1948 3

Major Rule Changes for 1947

April 3, 1947 2

Major Rule changes 1946

January 11, 1946 1

Major Rule Changes 1945

December 17, 1945 1

Coaching from the bench was legalized

April 20, 1944 0

NFL adopted free substitution

April 7, 1943 1

Major NFL Rule Changes 1942

April 1, 1942 1