Former MLB pitcher Tommy John has passed away at the age of 83. He was known for being the namesake of a pioneering elbow surgery. The surgery, which extended his career, was performed in 1974 and involved replacing a ligament in the elbow with a grafted tendon from another part of the body.

Further details about Tommy John's life and the revolutionary surgery that bears his name are available from the source, including information about the procedure and its impact on his career.