On September 25, 1974 — In the first-of-its-kind operation, Dr. Frank Jobe transplants a tendon from Tommy John’s right wrist to the Dodger pitcher’s left elbow. The revolutionary ulnar collateral ligament reconstruction, which will become a standard surgical procedure better known as Tommy John surgery, enables the southpaw to win an additional 164 games, more than half of his career total of 288 victories.

Sources:
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