Rules

Boston Yanks became the New York Bulldog

January 20, 1949 44

Major Rule Changes 1949

January 11, 1949 55

Los Angeles Rams debut first modern helmet emblems in pro football

September 22, 1948 45

Major Rule Changes 1948

January 14, 1948 50

Major Rule Changes for 1947

April 3, 1947 49

Major Rule changes 1946

January 11, 1946 54

Major Rule Changes 1945

December 17, 1945 47

Coaching from the bench was legalized

April 20, 1944 47

NFL adopted free substitution

April 7, 1943 48

Major NFL Rule Changes 1942

April 1, 1942 41