Barkley's big day leading USC

Posted by ESPN.com's Brian Bennett

SOUTH BEND, Ind. -- Matt Barkley has over 330 yards passing, and the fourth quarter hasn't even begun yet. Barkley had 195 passing yards in the third quarter alone.

The true freshman quarterback has had a great day, helped by his offensive line and many open receivers. The USC passing game and its defense are the difference right now as the Trojans are close to salting this one away when the fourth quarter begins.

Barkley has outplayed Jimmy Clausen, though Clausen has had a much tougher time because of USC's outstanding defense. Clausen's Heisman Trophy hopes probably end today barring a miracle comeback.