USC's Marqise Lee, the 2012 Biletnikoff Award winner as the nation's top receiver, left the Trojans' practice early on Friday after suffering an apparent injury.

Lee was in obvious pain after catching a long pass from Cody Kessler, and the USC trainers and doctors were looking at his right shoulder area. He was carted off the field for evaluation and did not return. USC coach Lane Kiffin had no further word on Lee's status during his post-practice session with the media.

"I didn't see him come down," Kiffin said. "It was a really deep ball, and I was getting ready for the next play. Somebody has to step up. Darreus Rogers has looked good, next guy up."

Lee, a junior, is one of the most explosive players in college football and currently owns or shares 22 USC records. He has 191 career catches for 2,864 yards and 25 touchdowns, along with 40 kickoff returns for 1,141 yards and two touchdowns.