Subjects in this group will receive one injection with corticosteroids and then one injection with local anesthetic two weeks later. For the first injection patients will have 15ml of blood drawn. This blood will then be discarded in a biohazard container. A 6ml solution of 4ml 0.25% Bupivacaine, 1ml 40mg Kenalog, and 1ml 4mg Dexamethasone will be prepared. A posterior glenohumeral injection under ultrasound guidance will be performed to inject the steroid solution using a 22g needle. A dry sterile dressing will be placed at the injection site.

For the second injection two weeks later patients will have 15 ml of blood drawn. This blood will then be discarded in a biohazard container. Using the same technique as in Visit 2, the investigator will inject a 6 ml solution of 2 ml sterile normal saline with 4 ml 0.25% Bupivacaine to the shoulder using ultrasound. A dry sterile dressing will be placed at the injection site.

American Shoulder and Elbow Surgeons (ASES) scale is used to measure shoulder function. It is combines both physician assessment and patient self-reported questionnaire date to create the functional score.

Rotator cuff tear size will be determined using ultrasound imaging. The mean size at six months and one year will be compared to baseline per-treatment size.