Raiders quarterback Terrelle Pryor was limited in his return to practice on Thursday. He was formally cleared for practice in the morning just three days after suffering a concussion Monday at Denver. He spent the open portions of practice shadowing healthy quarterbacks with his helmet off.

Raiders coach Dennis Allen said that Pryor was limited but took some team reps with his helmet on.

With one practice remaining Pryor’s rate of progress may not be enough to start Sunday’s game against Washington. ESPN’s Adam Shefter citing unnamed sources reported that Pryor is unlikely to play on Sunday.