This was a torn rotator cuff and labrum. The doc was impressed - in a clinical curiosity sense - that I was able to do both. Most people, upon tearing one, stop doing whatever it was that caused it.
Labrum tears can be invisible with respect to pain.
My physical therapist said that he prefers not to have MRIs until after he's starting looking, because they can discover old injuries that are not causing the current problems. Some high percentage (50%? I don't recall) of his patients had undetected prior injuries.
Regards, -scott Welcome to Rivendell, Mr. Anderson.