CORVALLIS, Ore. (AP) -Oregon State running back Yvenson Bernard had surgery on his right knee Tuesday.

Beaver coach Mike Riley described the procedure as a scope to clean up Bernard's knee, which was injured in the first half of the Beavers' 52-17 victory at Washington State last Saturday.

Oregon has a bye this week before playing Oregon at Autzen Stadium in the annual Civil War rivalry game.

``It's questionable at best for his return in time for the Civil War,'' Riley said. ``We feel better about his chances to play in our bowl game. But, we're talking about Yvenson Bernard, so I won't rule out anything at this point.''

Bernard, a senior, has rushed for 3,685 career yards, second most in Oregon State history.