Rockies reliever Jairo Diaz will undergo Tommy John surgery

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Promising Rockies reliever Jairo Diaz will require Tommy John surgery to fix a ligament in his right elbow, Nick Groke of the Denver Post reports. Diaz suffered the injury in Saturday’s spring training match-up against the Padres. Needless to say, the surgery will keep Diaz out of action for the entire 2016 season and some of the 2017 regular season.

Diaz, 24, was vying for a spot in the Rockies’ bullpen after putting up 19 solid innings of work in the last month and a half of the past season. He compiled a 2.37 ERA with 18 strikeouts and six walks, showcasing a fastball in the high 90’s and a slider that averaged 90 MPH as well.

The Rockies acquired Diaz from the Angels in a December 2014 trade, sending infielder Josh Rutledge the other way.