The Chemeketa (7-14) built an early edge on Saturday, but the Olympic (10-17) roared back to steal a 2-1 victory at Gateway Complex.
The Olympic took the lead in the fifth inning on an RBI single by Samantha Gorham.
Rachel Ranyak picked up the win for the Olympic. Ranyak allowed one earned run, four hits and one walk while striking out three over seven innings of work.
A bright spot for the Chemeketa in the defeat was Lindsay Hill, who allowed only two runs while striking out 11.
Hill (0-3) took the loss for the Chemeketa.