 This rule had a direct impact on deciding the 1921 championship, in which the losing team insisted that the deciding game only be considered an exhibition.In 1924, the league again changed the rule to declare any games held in December or later to be exhibitions.By the mid-1930s, teams prepared for a standard 12-game regular season schedule, although even as late as 1939 teams would schedule non-league exhibition games both before and during the season (during bye weeks).