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Greene is slated for Tommy John surgery, C. Trent Rosecrans of The Athletic reports.

Greene had been progressing nicely in March, tossing bullpen sessions without issue. However, he evidently suffered a significant setback and will have to go under the knife, effectively ending his 2019 campaign. The 19-year-old prospect hasn't pitched in a game since July of 2018 and likely won't return until around the 2020 All-Star break.

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