Matt Barkley, the USC senior quarterback, won’t play against Notre Dame Saturday, Lane Kiffin just told the media. Kiffin called Barkley’s injury an AC sprain to his shoulder, which was suffered late in Saturday’s loss to rival UCLA. You can see the violent hit below.

This is enormous news because if Notre Dame wins, the Irish advance to the BCS title game. Kiffin announced backup Max Wittek will start.

Here’s the hit that knocked Barkley out of the Notre Dame game.