Oklahoma State starting quarterback Wes Lunt was helped off the field with a left knee injury early in the first quarter of Saturday's game against Louisiana-Lafayette.
Oklahoma State safety Victor Johnson will be out indefinitely after injuring his left knee in the Cowboys' win against Texas A&M on Thursday night.
Left tackle Trinton Sturdivant has left No. 13 Georgia's game against ninth-ranked Oklahoma State with a left knee injury, and he is not expected to return.
Oklahoma State has lost a key part of its offensive line, likely for the entire season.
Oklahoma State coach Mike Gundy expects starting quarterback Wes Lunt's left knee to be immobilized for the next several days as he tries to recover from an injury sustained Saturday.