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Tom·my John surgery | \ ˈtä-mē-ˈjän- 
\
\ plural Tommy John surgeries
Definition of Tommy John surgery
: a surgical procedure in which a torn ulnar collateral ligament of the elbow is replaced with a tendon graft typically obtained from a superficial muscle of the forearm : ulnar collateral ligament reconstruction Dr. Timothy Kremchek, the medical director for the Cincinnati Reds, specializes in an elbow-ligament reconstruction procedure commonly known as Tommy John surgery, named for the Los Angeles Dodgers pitcher who first underwent it, in 1974.— Sara Corbett But as an outfielder he hurt his throwing arm and had to have Tommy John surgery before the year was out.— Kelli Anderson
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Tommy John surgery
nounTom·my John surgery | \ ˈtäm-ē-ˈjän- \
\Medical Definition of Tommy John surgery
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The first known use of Tommy John surgery was in 1984
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