All-America Football Conference playoffs
The All-America Football Conference playoffs were the postseason games of the All-America Football Conference (AAFC), an American football league which challenged the established National Football League (NFL) from 1946 to 1949. From 1946 to 1948, the AAFC determined its champion in a title game between the winners of its two divisions.
Source: Wikipedia — All-America Football Conference playoffs (CC BY-SA 4.0)