Chicago Cardinals take the belt

Chicago Cardinals beat Chicago Bears 21–7 at home to start reign 59 of the NFL belt, the 6th for the franchise.

Chicago Bears had held it since November 12, 1939, with 3 defenses over 318 days.

Chicago Cardinals held it for 4 days and 0 defenses, then lost it to Green Bay Packers on September 29, 1940.