"Barkley hurt the shoulder when he was sacked with two-plus minutes remaining in USC's 38-28 loss at the Rose Bowl. He was examined on the field by the school's training staff before walking off on his own but did not return to the game.
"I feel bad for him and his family," Kiffin said. "This is obviously not how you want it to be."
Roughly an hour after the game ended, Barkley left the stadium with his right arm hidden in a sweater. His shoulder appeared to be supported by a sling, but he declined to offer information on the injury, citing the program's policy.
USC normally does not disclose or discuss injuries unless the players are confirmed to be out for the season."
USC freshman QB Max Witteck will replace Barkley on Saturday.