Down 5-3 entering the seventh, Oregon State plated two off a passed ball and a wild pitch. The two runs evened the score but the Beavers turned around and allowed Stanford two runs in the bottom half of the inning.
Jared Norris scored from third on a wild pitch to make it 7-6 in the eighth but Stanford got the final four outs of the game.
Three Beavers had two hits in the loss: Koa Kahalehoe, Stefen Romero and John Wallace.
Tanner Robles, throwing in his first game in relief this season, dropped to 1-3 after taking the loss. He allowed two runs and no hits in three innings of work. The Beavers, meanwhile, now sit at 34-17 overall and 14-12 in Pac-10 games.
The Beavers used six pitchers on the night -- OSU relievers combined to throw 4 2/3 innings, striking out nine while allowing one hit.
With UCLA topping ASU on Saturday, Oregon State now sits in fourth place in the Pac-10, a game behind the Bruins.
Oregon State and Stanford conclude the regular season in a 12 p.m. PT start Sunday at Sunken Diamond.
Beavs fall 7-6, regular season finale looms
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