Two young players that had been competing for starting positions had setbacks recently, missing time due to injury.
Redshirt freshman linebacker Jon-Michael Terry had been battling at middle linebacker but has missed the last week and a half.
With Terry's absence, freshman Kenneth Murray has been getting the bulk of the work at that spot after rotating with Terry on the top squad early in camp.
Defensive coordinator Mike Stoops said Terry would have “some catching up to do” when he returned.
Freshman safety Robert Barnes missed about a week of practice before returning Thursday.