List of baseball players who underwent Tommy John surgery

Tommy John surgery (TJS), known in medical practice as ulnar collateral ligament (UCL) reconstruction, is a surgical graft procedure in which the ulnar collateral ligament in the medial elbow is replaced with either a tendon from elsewhere from the patient's own body, or the use of a tendon from the donated tissue from a cadaver. The procedure is common among collegiate and professional athletes in several sports, most notably baseball.

The procedure was first performed in 1974 by orthopedic surgeon Dr. Frank Jobe, then a Los Angeles Dodgers team physician. The surgery is named after Tommy John, the first recipient of the surgery. John won 288 games in his career – 124 before the surgery and 164 after. Many players have subsequently undergone the surgery, some more than once. Three players (Paul Molitor, John Smoltz, and Billy Wagner) have undergone the surgery and been inducted into the National Baseball Hall of Fame. Pitcher Hong-Chih Kuo underwent the surgery a record four times before making a return to the MLB with the Los Angeles Dodgers, while Tejay Antone had three successive surgeries before making his way back to professional baseball.

List Denotes a player that underwent the surgery on his non-throwing arm.

PlayerPositionThrowsDate of surgeryRefPitcherRightPitcherRight PitcherRightPitcherRightPitcherLeftPitcherRightPitcherRightPitcherLeftPitcherLeftPitcherRightPitcherRightPitcherRightPitcher / OutfielderLeftPitcherRightPitcherRight PitcherRightPitcherRightInfielderRightPitcherRight PitcherRightCatcherRightPitcherRightOutfielderRightPitcherLeftInfielderRightPitcherRightPitcherRight PitcherRightPitcherRight PitcherLeftPitcherLeftPitcherRight PitcherLeft PitcherLeftPitcherRight PitcherRight PitcherRightPitcherRightPitcherRightPitcherLeftOutfielderRightInfielder / OutfielderRight PitcherRight PitcherLeft PitcherRight PitcherLeft PitcherRight PitcherLeftPitcherRightPitcherLeftOutfielderRightPitcherRightPitcherRightPitcherRightPitcherRightPitcherLeftPitcherRightPitcherRight PitcherRight OutfielderRightPitcherRightPitcherLeftPitcherRightPitcherRightPitcherRight PitcherRightCatcherRightCatcherRightPitcherRightPitcherLeftPitcherLeftPitcherRightOutfielderLeftCatcherRightPitcherRightPitcherRight Pitcher Right PitcherLeft InfielderRight PitcherRight PitcherLeft PitcherLeftPitcherLeft Pitcher Right Catcher Right PitcherRight Pitcher Left ShortstopRight OutfielderLeft PitcherLeft PitcherRight Pitcher Right Pitcher Right CatcherRightPitcherRight Catcher Right Pitcher Left PitcherLeftPitcher Right PitcherRightPitcherRightPitcher Right PitcherRight PitcherRight PitcherRightOutfielder Left PitcherRight Pitcher Left Pitcher Right PitcherRight PitcherLeftPitcherLeft Designated hitter Left Pitcher Right Pitcher Left Pitcher Right PitcherRightPitcherRight PitcherLeft PitcherRight PitcherRight Pitcher Right Pitcher Right PitcherRightPitcherLeftPitcherRightPitcher Right Pitcher Right Pitcher Left Pitcher Right PitcherLeftPitcherRightPitcher Left PitcherRightShortstopRightPitcherRightPitcherRight PitcherLeft PitcherRight Pitcher Right PitcherRight Pitcher Right Pitcher Right Pitcher Right Pitcher Right PitcherRight PitcherLeft PitcherRight PitcherRight PitcherRight PitcherRight PitcherRight ShortstopRight Pitcher Right PitcherRight Pitcher Left Pitcher Right OutfielderRight Pitcher Left PitcherRightRight fielder / Designated hitterRightPitcherRightFirst basemanLeftPitcherLeftPitcherRightPitcherRightPitcherRightPitcherRight PitcherLeftPitcher Right Pitcher Right PitcherLeft OutfielderRight PitcherRight CatcherRightPitcher Right Pitcher Left Pitcher Right PitcherRight PitcherRight Pitcher Left OutfielderRightPitcherRight Catcher Right Pitcher Right Pitcher Right CatcherRightPitcherRight PitcherRightShortstopRightCatcher Right PitcherLeftPitcherRightInfielderRightPitcherRightPitcherRightPitcher Right Pitcher Left Pitcher Right Pitcher Right Infielder / OutfielderRightPitcherLeft Catcher Right Pitcher Right Pitcher Right Rays Kittredge had his Tommy John elbow surgery today and it was considered to have gone wellCatcher Right PitcherRightPitcher Right Pitcher Right PitcherRightPitcherRightPitcher Right Pitcher Left PitcherRightPitcherRightPitcherLeftPitcherRightPitcherRight PitcherLeft Pitcher Right PitcherRight PitcherRight Pitcher Right PitcherLeftPitcherLeft Pitcher Right Pitcher Right PitcherLeftPitcherLeft Catcher Right PitcherRightPitcher Right Pitcher Right Pitcher Right PitcherRight Pitcher Left Pitcher Right PitcherRight InfielderRight Rill, Jake. "Mateo undergoes elbow surgery, shut down for rest of '24," MLB.com, Wednesday, August 28, 2024. Retrieved August 29, 2024.PitcherRight Pitcher Right Pitcher Right PitcherLeftPitcherRightPitcherRightPitcher Right Pitcher Left PitcherRightPitcherLeftPitcherRightPitcherRightPitcherLeftPitcherLeftPitcherRight Pitcher Right PitcherRight PitcherRight PitcherRight Pitcher Left Pitcher Right Tigers RHP Casey Mize says on Instagram that he underwent surgery this morning in Texas. His hope is to pitch at some point next season.Third basemanRightPitcherRight PitcherLeftApril 2025PitcherLeft Pitcher Right PitcherLeftPitcher Right PitcherRightPitcherRightReds' Jon Moscot undergoes Tommy John SurgeryPitcherLeft PitcherRight PitcherRightOutfielder Right PitcherRight The Star Ledger. May 1, 2015. pg. 33PitcherLeftPitcher Left PitcherRightPitcherRight PitcherLeft Pitcher Left Pitcher / Designated hitterRight PitcherLeft Pitcher Right PitcherRightPitcherRightPitcher Right Pitcher Right PitcherRight Pitcher Right Pitcher Left PitcherRightOutfielderRightPitcher Left PitcherRight Pitcher Left CatcherRight PitcherRight PitcherRight PitcherRight PitcherLeft Pitcher Left PitcherRight PitcherRight PitcherRight PitcherLeft PitcherRight PitcherRight Pitcher Right PitcherRight Pitcher Right PitcherLeft PitcherLeft PitcherRightPitcherRight InfielderRight Pitcher Right Pitcher Left Pitcher Right PitcherRight Jake RogersCatcherRight Pitcher Right Pitcher Right PitcherLeftPitcher Right PitcherRight Pitcher Right PitcherLeft2004June 18, 2022PitcherRight PitcherLeftPitcher Right Third basemanRight PitcherLeftPitcherRight ShortstopRightPitcher Right Pitcher Right Pitcher Right PitcherRightPitcherLeftPitcher Right Pitcher Right Pitcher Right PitcherLeftPitcherRightPitcherLeftPitcherRightPitcherLeftPitcher Right PitcherRight Pitcher Right Pitcher Right Pitcher Right Pitcher Left PitcherRightPitcherRightPitcher Right PitcherRightPitcherLeftPitcher Right PitcherLeftPitcherRightPitcher Right Catcher Right CatcherRightCatcher Right Pitcher Right PitcherRightPitcherRight Pitcher Right InfielderRight Pitcher Left Pitcher Right Pitcher Right PitcherLeftPitcherRightPitcherLeftCatcherRight PitcherLeftPitcherRightPitcherLeftPitcherRightPitcher Left PitcherLeft Pitcher Right PitcherRightPitcherRightPitcherRightPitcherRight Pitcher Right PitcherLeftPitcherRightPitcherRightPitcherRightPitcherRight CatcherRightPitcherRightPitcherRightPitcher Right Outfielder Right PitcherRightPitcherRightPitcherLeft Pitcher Left Pitcher Right Catcher Right PitcherRight PitcherRight PitcherLeftPitcher Right InfielderRight PitcherRight PitcherRight PitcherRight PitcherRight PitcherRight PitcherRight PitcherLeftPitcherRightPitcherRightPitcherRightPitcherRight

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