C Robbie Tobeck is back on the field after leaving for a few plays. He has a sprained knee.
EARLIER: C Robbie Tobeck just left the game with 10:33 remaining in the fourth quarter. He was limping off the field. This looks like a leg injury. We do not have details on this injury, but we'll pass them along whenever possible. Chris Spencer takes over at center for Seattle. UPDATE: Tobeck has a sprained knee, the team said. His return is questionable.