Position changes
What about guys like Dexter Foreman, and Devon Wright, one is a Junior one is a senior. Both seem to have decent speed, have they attempted defense with either guy. Wright didn't see the field even with the shortage at WR, why not try him at strong Safety and see if he can contribute in a spot like that, he has good straight line speed and seems to contribute on special teams, at least he did a lot as a sophmore why not give the guy a shot at being a blitzing strong safety or short yardage guy.
Foreman he has played quarterback maybe he can contribute at free saftey, the guy can run and move can he tackle?
I'm not saying it is 100% plausible that either guy can play defense but if neither guy is going to be used at RB/WR or QB why not give them a shot on defense, you never know what might turn up without trying.
Ernie Heifort doesn't seem like a guy that will get any time with the log jam at Tight end, can he put his hand on the ground and rush the passer, he has size and decent to OK wheels?