A boy about seven rows behind the third-base dugout at Yankee Stadium was hit on the head by part of Chris Carter's bat, which shattered on a seventh-inning grounder in the Yankees ' 3-0 win over the Royals.
Medical personnel carried out the boy, who appeared to have a leg that was in a brace.
Yankees spokesman Jason Zillo said the fan got first aid at the ballpark and was receiving medical attention elsewhere, but did not disclose where.