Cal starting fullback Eric Stevens will miss the 2011 season after tearing the anterior cruciate ligament in his right knee.
Stevens, a junior, started five games last season. He had only one carry for 2 yards and caught four passes for 27 yards and a touchdown.
Stevens, who was hurt during practice Wednesday, said nobody made contact with him on the play.
"It was one of those freak accidents," Stevens said. "I just planted a little funny. I was a little off balance and couldn't catch myself."
Senior Will Kapp is expected to move into the starting role.