Jobe discovered that years of use had worn away John’s ulnar collateral ligament (UCL,) a tendon connecting the upper arm bone to the forearm at the elbow. In 1974, Jobe replaced John’s missing UCL ...

Jake Cousins exited his most recent rehab appearance with a setback that the Yankees confirmed to be a UCL injury. Read more at MLB Trade Rumors.

The Detroit Tigers right-hander got an official announcement on his injury from the club.

He was already on the 15-day injured list for a right ulnar collateral ligament. Now he'll be out for 14 to 18 months after going under the knife. It's a huge loss for Arizona's bullpen. Martinez ...

Reliever A.J. Puk also needs elbow surgery, to repair his left ulnar collateral ligament, a procedure that could turn into Tommy John.

Marlins right-hander Max Meyer will undergo season-ending labral repair surgery on his left hip on Friday, the club told reporters ahead of Tuesday's game at the San Francisco Giants.

On Wednesday, Lucas Giolito made his second rehab appearance with Triple-A Worcester as the right-handed pitcher looks to return to the Boston Red Sox.

He ended up needing surgery for a torn ulnar collateral ligament, which has prevented him from pitching since then. How many Tommy John surgeries has Shohei Ohtani had?

Detroit Tigers manager A.J. Hinch wouldn't say when the Detroit Tigers plan on bringing back injured right-hander Reese Olson from the injured list.

Common injuries encountered include ulnar collateral ligament (UCL) tears, flexor-pronator muscle tendinosis or tears, ulnar neuritis, posterior impingement, ostechondritis dissecans of the capitellum ...