He didn't miss. Go back and watch the play, his feet were never in position to make the tackle. Which is why he reached for the shoulder pads. It wasn't for Thomas to make the play (he was chasing from an outside block). It was up to Barna and Barnett to help clean up. Go back and look - neither of them were able to get close enough to Sayin to put a hand on him. There was no failure. Ohio State did exactly what all talented offensive lineman do, when your man beats you, you turn toward the quarterback and block the next free defender. Watch the play again - Barna and Barnett got into the backfield, but they never got close to Sayin.