Fox's injury is a ruptured Achilles. Clawson's exact quote was: "We’ll see what happens. He’ll be out for the season."
He'd certainly be eligible for a medical redshirt and could be back next year. I think -- and obviously this is without talking to him, as he just underwent surgery today -- the bigger factor is him deciding to keep playing football after being injured last season, going through a 7-8-month recovery, finally getting back and a week after getting pads back on, suffering another injury and staring another 8-12-month recovery process in the face. I never played college sports, but I've gotta think going through basically 20 months of recovery is daunting.
Not sure there's any more frequency at Wake, or if it just feels that way based on the last two years. It's certainly worth asking about, though. Clawson mentioned around bowl season, or maybe it was after, that he wanted to compile research on why they had so many guys get hurt last year. When I asked at onset of spring ball, don't think he had data available, IIRC.