He will be seeing the Dr on Feb 5th I will let you know what he said. My son had a 5cm separation. We went to a physical therapist about year ago and he said the same thing that a lot of major league pitchers have loss range of motion but that a then fourteen year old should not have it at his age.
I am starting to lean on not having surgery because he no longer pitches and catching at his school seems to be log jammed with juniors and seniors. He only catches on his travel team one game per weekend but on the high school team they have him in the outfield so that works to his advantage plus he can really hit so he can DH. Sad thing is most colleges do not recruit DH's.
The sad part is that he will always wonder “what if this would have never happened” as will I always wonder.
Good luck to your to son.
951dad