Dude I have a torn rotator cuff. I can't raise my arm above my head to save my life. It's not that it hurts anymore, the muscle just doesn't work. That would be bad news and it hurts like hell when it happens. Enough that Fox would not risk heavy fines lying about it. Only thing is if it got torn AFTER the game. Slipping on ice, etc.
Another thing to consider is DMac will say stuff to generate interest and audience participation. Doesn't mean it wasn't what he was told, just means that if its intriguing yet not a solid rumor he will still go with it.