Jerry, thanks for your concern and wishes. The doctor didn't understand why my left shoulder! To think back, it was the fall I had, ~8 months back, at Fred's. The awkward fall on the left shoulder must have started the gradual weakness and pain. The wrong types of weight training I did to strengthen the shoulder must have further inflamed the area. Mayo Clinic has scheduled a series of PT sessions. I have started doing a few targeted rubber-band stretches.; I Hhope it will resolve the problem by mid -November.