TigerPawMom, thank you for the link to the Hopkins article. I had not seen that one. Please be certain that I am not rushing him to surgery. Quite the contrary, I may be delaying the inevitable, as his physical therapy since August has not cured his problem he's had since April.
CoachDad, we are in Massachusetts. I am willing to travel, to get this right.
2seamer, I am very happy to hear of your son's perserverence and success. He must be a hard worker. The MRI (actually called an MRA when dye injected) did not show a labrum tear. According to the Johns Hopkins article provided by TigerPawMom, the MRI may not show a tear. I am going to ask about the new C-T scan that may reveal more. Gimages, he did have an x-ray, and Doc 2 said his growth plate looked ok. In fact the only good news to come out of this saga was that at 6'1" he is not done growing.
Thank you all for your responses. Please keep them coming, especially if your son had a similar experience, or if you know whether it is worth it to make a pilgrimage to Birmingham.