USC defensive lineman Claude Pelon was scheduled to have arthroscopic knee surgery Thursday, Steve Sarkisian said.
Pelon, a senior, suffered a knee sprain this week and the surgery was intended to determine if there was more damage, Sarkisian said.
Pelon, 6-foot-4 and 300 pounds, started three games in 2014. He finished with six tackles for losses, including 2½ sacks.
Pelon redshirted at Coffeyville (Kan.) Community College and played at Eastern Arizona College and Mesa (Ariz.) Community College before transferring to USC.
USC opened training camp with 15 defensive linemen.