Abstract
Ulnar collateral ligament (UCL) injuries are a common pathology and well documented for overhead athletes. Limited research has focused on the UCL in competitive golfers. Ultrasound imaging has become a common Point of Care diagnostic tool to diagnose UCL injury. Ultrasound imaging protocols have been described using external mechanical valgus forces to evaluate medial joint space (MJS) opening as an indicator of joint instability and UCL insufficiency, and images have reliably identified the width of the UCL at the mid substance and apex of the trochlea.