PASADENA, Calif. -- USC quarterback Matt Barkley left Saturday's game against UCLA with an apparent shoulder injury after being sacked late in the fourth quarter of the Trojans' 38-28 loss to the Bruins at the Rose Bowl.

After the game, Barkley talked to the media with his right shoulder hidden inside a sweater. The shoulder appeared to be supported by a sling. Barkley declined to discuss the injury, citing the program's policy on not disclosing injuries.

USC was driving with under three minutes to go in the game when UCLA linebacker Anthony Barr brought down Barkley with a big hit from his blind side.

Barkley stayed down on the field and was examined by the team's training staff, then walked off the field on his own power.

He did not return to the game and was replaced by redshirt freshman Max Wittek.

Barkley answered only three questions in an abbreviated postgame news conference before being whisked away to the team bus by a school spokesperson. He said he thought he played "up and down" against the Bruins.

"I thought I fought as hard as I could've fought," Barkley said. "I went down fighting. Plays were there, plays weren't there. There were times where I felt like I could've broken the game open. It just didn't happen.

"I would (put) this loss on myself, as I do every loss. It's just unfortunate."

Barkley finished with 301 yards on 20-of-38 passing, three touchdowns and two interceptions.

The play he was hurt on was the only time he was sacked during the game.