It was a twelve-team league that played a 22-game schedule followed by two separate 15-game schedules for the best six teams and the weakest six teams, and is overseen by the KNBSB.
The season ran from April to August and previously had a promotion and relegation system with the highest level of baseball in the Netherlands, the Honkbal Hoofdklasse, so that the composition of the top level may change from year to year.
The 2011 Honkbal Overgangsklasse season began 8 April.
[1] The 2011 Honkbal Overgangsklasse 1–6 (best teams) season began on 25 June and ended on 4 September.
[2] The 2011 Honkbal Overgangsklasse 7–12 (weakest teams) season began on 25 June and ended on 4 September.