A league champion was determined at the end of each season.
Champions were decided by postseason playoffs, winning the regular season pennant, or being declared champion by the league office.
In its final season of operation, three division winners and a wild card team (the team with the best second-place record in the league) were determined at the end of the season.
The division champion with the highest winning percentage played the wild card team, while the other two division champions faced each other in best-of-three series.
The winners then played one another in a best-of-three series to determine the league champion.