Thanks for the comments.
One thing I truly thankful is that his college coach has been great. Last year when he was going through rehab, His cosch met with him one on one almost weekly. he called me about once a month.
The conversation about hanging it up went very well and he is doing everything to keep my son part of the program and seems to taken an interest in helping him develop as coach.
My biggest advice to kids, is to really pick a college with the idea that of you have stop playing, is it place they can continue to get their education and be happy doing so.