Mateo was removed from Sunday's game against the Rays with an apparent head injury, Melanie Newman of MASN reports.
Advice: The 28-year-old appeared to be struck in the head by a bat around the on-deck circle during the fourth inning and was replaced by a pinch hitter shortly thereafter. He singled in his lone plate appearance before exiting the contest. The specifics of the injury are unclear, but Mateo is likely being evaluated for a concussion.
Rotowire.com
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