On Friday, Los Angeles Angels pitcher Sean Burnett became the latest player this season to undergo "Tommy John" surgery. In this weekend's MLB draft, at least four players selected had already had the infamous elbow surgery as amateurs.
The operation is named after the first player to undergo the procedure to fix an injured elbow ligament, in 1974. Pitchers are particularly vulnerable to this injury.
The procedure involves taking a tendon from somewhere else in the body — or from a cadaver — and grafting it into place. Pitchers get it most often.