They can't play any of the "skill" positions, because they're not allowed to touch the "pig skin".
Can’t recover a fumble? What good is he?
True story. I played DT in Div 3. (Big, fat, white guy in the middle). I , quite by accident, ran into the other teams RB-hard. He coughed up the ball on our 2 yard line. I jumped on it. My friend-to this day-still breaks my chops because he ran in from his safety spot where he was about to scoop up the ball and go 98 yards to the house. There was literally no one between him and the end zone except me. It was quite clear on videotape.
Oops. My bad, Dog.