Reverse total shoulder arthroplasty (rTSA) reliably reduces pain and improves function in patients with rotator cuff arthropathy, failed shoulder arthroplasty, proximal humeral fractures, and irreparable rotator cuff tears.4 Nevertheless, postoperative complications are common, and reported rates range between 7% and 21%, with instability being among the most common.7,11 Instability rates after rTSA have ranged between 0% and 16% with risk factors including male sex, high body mass index, rTSA as revision for a prior failed arthroplasty, failure to adequately tension the soft tissues, and component impingement.