Oregon State's quarterback shuffle is emblematic of what has been happening around the Pac-12 all season. Injuries and inconsistency have dogged many teams in a league that has always been known for its strong quarterbacks.

The No. 15 Beavers started out the season with Sean Mannion under center. Because of injury they went to Cody Vaz. Then it was back briefly to Mannion. This week it's undetermined.

Other Pac-12 teams that have switched quarterbacks include No. 14 Stanford, which started with Josh Nunes but swapped him for dual threat Kevin Hogan, and beleaguered Colorado, which started the season with Kansas transfer Jordan Webb but is now looking toward Connor Wood and Nick Hirschman.

Washington State has gone back and forth between Jeff Tuel and Connor Halliday.