Rogier van Zon of Honkbalsite.com reports on Tuesday that head coach Frank Koene and assistant coach Peter Barentsen have resigned from their duties at the Hoofdklasse club KONICA MINOLTA PIONIERS. Theo Geerman, who worked as an assistant coach, takes over temporarily. The club will decide next week how to end the current season. Koene and Barentsen mentioned chemistry problems with the team as main reason for their resignation. The PIONIERS are currently in fourth place in the standings with 18 wins, eleven losses and one tie in 30 games. However they have won just one of the past six games.