CORVALLIS — Oregon State running back Yvenson Bernard had surgery on his right knee on Tuesday.

CORVALLIS — Oregon State running back Yvenson Bernard had surgery on his right knee on Tuesday.

Beaver head 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 State has a bye this week before playing Oregon at Autzen Stadium in the annual Civil War rivalry game Dec. 1.

"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.

He gained 74 yards — moving into 10th place all-time in the Pac-10 Conference — and scored two touchdowns against Washington State before being sidelined.