Your welcome. Like everyone's said patience is the best advice we can give. Everyone's different and will regain ROM and heal from the surgery. Just a simple jog I could feel how underdeveloped my back and shoulder were to keep my shoulder joint in place. I rushed things a little more than I should and had the goal of being ready for a season that started in 10 months. I mentally played up my progression in my head. I was 18, stupid, and just wanted to get back on the field.
Talk to him about redshirting. He has a lot to lose if he reinjures his labrum or even tears his rotator cuff. During this time he can concentrate more on school and save a year of eligibility,