Royals prospect Kyle Zimmer could undergo minor shoulder surgery

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Royals pitching prospect Kyle Zimmer was pulled from the Arizona Fall League last week after he suffered a setback with his shoulder and now Andy McCullough of the Kansas City Star reports that the 2012 first-round pick could be headed for minor surgery.

Ranked among the top right-handed pitching prospects in the game coming into the year, Zimmer threw just 4 2/3 innings in the minors this season due to a right lat strain. The hope was that the 23-year-old would be able to play some catch-up during the Arizona Fall League, but he lasted just one inning into his third start before he was shut down with recurring tightness in his shoulder. Tests have come back inconclusive so far, but the Royals want an answer to what is ailing him.

“All the MRIs he’s had done, there’s been nothing structurally wrong,” assistant general manager J.J. Picollo said on Monday afternoon. “So that’s been a mystery with this. Just in talking to our doctors, it might be time just for an exploratory scope, just to see what’s in there. Just because it’s been a little bit of a mystery. Maybe that will clarify something for us. Maybe that will find something that the MRIs just didn’t show.”

It’s expected that the Royals will know by tomorrow morning whether Zimmer will undergo surgery.