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Jansen was taken out of Wednesday's game against the Astros due to tightness in his right hamstring, Christopher Smith of The Springfield Republican reports.

After displaying some discomfort on the mound during the ninth inning, Jansen was taken out of the game and is now confirmed to be dealing with a hamstring issue. The severity of Jansen's injury remains unknown, but Boston could refrain from using him out of the bullpen for the next few days at the very least.

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