I have noticed the same thing. I got the Big Ten Pre-Order Pack and I got a 77 rated Kirk Cousins and every single time he is in the game and takes a hit he is injured. I looked at his ratings and he has a zero injury rating. I didn't check the other guys that came in the pack but I can't understand what the point of giving out these pre-order bonus guys are if they can't stay in the game. Hopefully this is just an oversight and will be fixed but who knows.