had a work related injury in May 07. Tore the labrum? Also bicep muscle was cut and released? They called it a SLAP repair. 

Now almost two years later, he still is having pain. Was told he has osteoarthritis in the shoulder, but the pains he gets are in the overhead..when reaching..out to the side, and depending on situations/positions. He  is an auto mechanic by trade, and certain aspects of the jobs requirements are getting more difficult to do.  He was told that doing physical therapy could hurt it more. He does not want cortisone injections. He's used celebrex but has had side effects so he stopped.

He believes the doctors are just stating that the arthritis is the reason for the pain,because they are workers comp doctors looking out for their employer..

  he did not have any issues with the shoulder prior to injuring it, and is not getting any relief from the long ongoing chronic pain now. What options does he have, and is it still work related  or not?