Pitcher’s elbow (ulnar collateral ligament sprain) most commonly occurs in throwing activities, such as pitching a baseball. Athletes suffering from pitcher’s elbow experience an onset of elbow pain that becomes worse with activity. The pain is typically relieved with rest but returns on resumption of throwing at high speed.
Several muscles, nerves, and tendons cross at the elbow. Repetitive throwing may create an excessively strong pull on these tendons and ligaments.