 The primary outcome analysis will analyze by intention to treat only those patients who were randomized and did receive an attempt at an interscalene block. A secondary analysis will exclude patients who had a failed inter scalene block in the post anesthesia care unit. A tertiary analysis will be a multivariable analysis adjusted for demographics, preoperative naproxen use, use of general anesthesia, cumulative analgesic use and failed inter scalene block. 