Tommy John surgery is a medical procedure used to repair a torn ulnar collateral ligament (UCL) in the elbow. This ligament is crucial for stabilizing the elbow joint, especially in athletes who throw, such as baseball pitchers. The surgery involves taking a tendon from another part of the body and using it to replace the damaged ligament. Recovery from Tommy John surgery typically takes several months, during which rehabilitation exercises are essential for regaining strength and flexibility. Many athletes successfully return to their sport after recovery, often regaining their previous level of performance.