Do you have numbness in thumb, index and midle finger from time to time? If you do it may be thoracic outlet syndrome. A few MLB pitchers like Matt Harvey have had it.
No finger numbness. I have been to an orthopedic doctor. He is the one that told me that I didn’t have a torn rotator cuff, nor tendonitis, nor bursitis. Chiropractor says my neck doesn’t have the natural curve that it should and once it does, my pain should be better.