If he is 22 next season then yes, I think we are severely underestimating how much the injury derailed him.
if he gets back on track by the end of the season all will be well. Have him add some muscle in the off season and some might be surprised where the kid will end up.
I don't think he is that fragile, the Cal O'Reilly thing might have been worse than this. The kid is just coming back from a major injury he'll be fine.