We are unaware of any studies that compare the efficacy, patient satisfaction, and complication rates of these two different procedures. It is, therefore, the purpose of this investigation to explore these differences. We aim to randomly assign 100 subjects in an open-labeled fashion who are scheduled to have a total shoulder arthroplasty at the UMROI to receive either a continuous infusion of ropivicaine via an interscalene catheter or a single administration of a single dose interscalene nerve block plus Exparel injected into the soft tissue within and around the shoulder during surgery.