In the seventh inning, Montrell Marshall of Dayton hit a home run to tie the game at 1-1. In the eighth inning, Jose Garcia of Dayton doubled home Miles Gordon to give Dayton a 2-1 lead.
Pearce led the Whitecaps offense overall with two hits and an RBI while starting pitcher Elvin Rodriguez took a no-decision. Rodriguez allowed one run and struck out 12 in seven innings of work.
The Whitecaps are now 27-24 overall and six games behind first place Bowling Green.
West Michigan will continue its series at Dayton on Wednesday with first pitch schedule for 7 p.m.