At 4 weeks post-operatively, the following assessment tests will be undertaken: supine shoulder flexion, supine shoulder external rotation, supine shoulder internal rotation, functional movement testing, functional outcome measures, and the numeric pain rating scale. 1,2,3 Those subjects in the 'experimental group' will receive manual palpation of all upper quarter muscles, including the cervical and thoracic spine region, to detect the presence of myofascial trigger points (TPs). Dry needling will be performed to all detected TPs by a provider trained and experienced in TDN.