Abstract The tremendous forces generated by the upper extremity during throwing places the athlete at risk for developingvalgus tension injuries to the medial aspect of the elbow. Cubital tunnel syndrome, or ulnar neuritis, represents one component of a spectrum of medial elbow pathology that can affect the throwing athlete. This article reviews the pertinent anatomy, pathophysiology, clinical presentation, and surgical treatment for this condition. When nonoperative management fails, anterior submuscular transposition of the ulnar nerve deep to the flexor muscle group provides adequate protection from the trauma that occurs during athletic activity.