The league normally holds a postseason championship series between its top two teams. The format of the series has varied, with single-game, best-of-three, and best-of-five formats used at different times. In 1990 and 1991, a round-robin tournament was contested between three teams. In 2021, there was no postseason. As of 2022, eight teams—six division winners and two wild card teams—qualify for the playoffs seeded by winning percentage regardless of division standing. All postseason series are in best-of-three format.[1]
† In 1990 and 1991, the finals were structured as a three-team round-robin tournament.
‡ In 2021, there was no postseason; DSL Blue Jays had the league's best winning percentage (38–19; .667), followed by DSL Colorado (39–20; .661).
Championship wins by team
Championships by split-squad teams (e.g. DSL Yankees 1) are listed by their main team (e.g. DSL Yankees).
b The 1986 winners were a co-op team of Chicago, the Houston Astros, Los Angeles Dodgers, and Oakland Athletics; unclear if "Chicago" was White Sox or Cubs.[3]