The top pitching prospect for the Boston Red Sox, left-hander Jay Groome, will undergo Tommy John surgery next week, the team announced on Wednesday.

Groome, 19, the Boston’s first-round draft pick (12th overall) in 2016. The Red Sox signed him with a $3.6 million bonus.

Coming out of high school Groome pitched only 62/3 innings of rookie ball in 2016. Last year, he was sent to low Class A Greenville. But he was limited with injuries and made only 11 starts (6.70 ERA, with 58 strikeouts in 44 innings).

Groome was held back in extended spring training in Florida this year with what was called a mild forearm strain.

The surgery on his left elbow will take place May 15 in Los Angeles.

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