Left-handed reliever Jack Leathersich underwent season-ending Tommy John surgery on Thursday in New York.
The 25-year-old rookie was placed on the disabled list on July 3 after throwing an abnormally high 57 pitches in an outing for Triple-A Las Vegas on June 29. That outing, in which he gave up six runs, four walks, and two home runs in just two innings, was Leathersich's first appearance back in the minors after being optioned down to Triple-A on June 28.
Leathersich made 17 appearances for the Mets this season, throwing 11.2 innings, and posting a 2.31 ERA with 14 strikeouts and 7 walks. With the Mets' options for left-handed relief left to the ineffective Alex Torres and the still-injured Jerry Blevins, a healthy Leathersich could have been an option for the club down the stretch.
Instead, the former fifth-round pick in the 2011 draft will be the latest young Mets arm to undergo the now-ubiquitous elbow procedure, which will keep him out of action for at least 12 months.