Sophomore catcher Stefanie Ewing scored on a wild pitch in the bottom of the sixth to lift the Beavers over the Bears on Saturday.
Prior to sealing home, Ewing got her second hit of the day with a two-out single though the left side. She was then on second, and sophomore DeAnn Young hit a single to right field, moving Stefanie to third.
Pitcher Brianne McGowan, now 16-6 on the season, got her 91st career victory at Oregon State, tying the all time record set by Tarrah Beyster from 1997-2000.
The Beavers and Bears will play again in about an hour, at 1:00.