"The shoulder was dislocated, so he's got some tear," Beckman told illiniinquirer.com. "Right now, I think the best scenario for him would be to redshirt and get this thing fixed because it's going to be about a six-month deal (recovery). ...It's a shame, but let's take care of it now so he can be ready for spring ball."
Corbin rushed for 1,103 yards and 12 touchdowns and caught 11 passes for 177 yards in his senior season for Gonzaga High School in Washington, D.C. He was projected to contend for the No. 2 running back spot behind senior Josh Ferguson. The Illini will now look to another freshman in four-star recruit Ke'Shawn Vaughn and junior Henry Enyenihi.
Illinois could also turn to senior cornerback V'Angelo Bentley, who took some reps in the backfield at Wednesday's practice.
"We've seen him do it as a punt returner," Beckman said. "We've seen him do it as a (defensive back). He's got great quicks and great football knowledge, which enables him as a senior to be able to play two positions like that."
Corbin is the second freshman running back to go down with injury joining Dre Brown, who torn his anterior curate ligament April 17 in practice. The news of Brown's injury came just 10 days after sophomore wide receiver Mike Dudek also torn his ACL in a non-contact practice drill.
The Illini have also seen injuries on the defensive side of the ball. Senior defensive end Jihad Ward will miss at least the first two weeks of the season after undergoing minor surgery.