On any collegiate roster, you're going to have all sorts of nagging injuries with a significant number of your players.
Some of them are at the point where they could play, but they would certainly be stuck with regular injections of Lidocaine, and would probably be better off hanging up the cleats.
I was rather surprised that Trevor Ruhland played that much last year. He was playing on knees that most of us would be painfully hobbled while simply walking.