I tore my rotator cuff on a Thursday night. I knew when I did it, but it just felt like I strained something. I didn't report it that night. Friday morning, I couldn't lift my arm. Manager wanted to know why I didn't report it at the time. I got an MRI 2 days later (I know. a world record for UPS and WC.) Showed a complete tear. UPS in their infinite wisdom put me thru 2 months of PT. It still bothered me. Had surgery. You're looking at 6-9 months of recovery for a normal rotator cuff tear. My shoulder has never been the same. I never went back to work. I tried to repair some wiring in a ceiling fan last week, and my shoulder limited my time I could work over my head. Even though I had successful surgery (according to the doctor) your shoulder may never be 100%. If you indeed damaged your shoulder on the job, You should be allowed to be made whole at no cost to you. Good luck.