Lots of college players were injury free until hitting the professional game, i.e.: Russell Okung and James Carpenter. Then those players hit the pros and are thereafter injury magnets. Some college players have injury problems throughout their college careers but manage as pros to be mostly injury free. Just because a player was injury prone as a college player doesn't mean that will be the case as a pro unless their knees or shoulders are so damaged they likely are barely able to make the initial medical clearance or they had serious concussion issues. I simply disagree about Tre Madden though I do understand where you are coming from in that regard.
I think it's still early, after 4 days of camp. Reality for him is he's probably facing an uphill fight to make the team. He will not lose out b/c of injuries but rather b/c he couldn't compete. Maybe it's a shoulder, maybe not, we don't know yet. If he shows enough talent, and he has talent, the team will keep him around to develop even if it's on the ghost roster or the PS. That will happen if the team thinks the injuries will resolve themselves.