CORVALLIS — It was a Monday football practice at Oregon State.

CORVALLIS — It was a Monday football practice at Oregon State.

In recent weeks, that has meant one question has been on the minds of many: Who will play quarterback?

"I'm not saying that right now,'' OSU coach Mike Riley said after practice. "I don't need to say that right now.''

The reason for the delay is the left ankle of Cody Vaz, who lost his first game as starting quarterback Saturday at Stanford.

Vaz was injured on a sack late in the game and walked out of Stanford Stadium on crutches.

"He's hopeful he'll be able to practice by Wednesday,'' Riley said as the No. 15 Beavers (7-2, 5-2 Pac-12 Conference) prepare to face California.

The crutches were gone Monday, but Vaz's limp was noticeable as he watched in sweats.

"The situation is pretty obvious,'' Riley said. "Cody's hurt. And Sean (Mannion) is champing at the bit, ready to go.''

Linebacker D.J. Alexander (rib/neck) and offensive guard Grant Enger (ankle) sat out practice, too.

Riley said he's hopeful they can return and play against the Bears.

"As far as the role they'll play, we'll just have to kind of play it out here,'' Riley said. "We'll go day to day.''

Meanwhile, Mannion took the vast majority of reps with the first unit. Afterward, he said he was 100 percent healthy and added that he was 100 percent healthy in Seattle on Oct. 27, when he threw four interceptions in the Beavers' other loss.

"Every week, you prepare like you're going to play,'' Mannion said. "Certainly this week, it's kind of a strange situation, but I'm obviously preparing like I'm going to play.

"It's unfortunate about Cody, I'm really feeling for him because I know it's a big bummer, but I know he'll get healthy. I'm just tryingto get every rep I can get and do the best with it.''

Mannion's family was in the Truax indoor practice facility watching Monday's practice on the Veteran's Day holiday.