Oh it can be done. Just ask Will Brooks, current FB at UT Chatt. Played FB that way his Sophomore yr with his left shoulder and his junior year with his right shoulder and still got over a 1000yds rushing junior yr. for JC. Shoulder would come out during a came, he'd hit the side line for a series or two then come back in. Spent a lot of time in rehab after both surgeries. So yes it can be done, yes it is very painful (ever had your shoulder repeatedly come out of socket?), just depends on what you can stand.
Hope it works out for him and he can play the rest of the season. He's a good young man, leader, and Lord knows they need him on the line.
Highly recommend Dr Becker at Knoxville Orthopedic for the operation.
GO BIG BLUE!!!