A 13-year-old fan seated near the Diamondbacks dugout was carried away on a stretcher after being struck on the head by a flying bat on Monday. The boy was hit on the right side of the head in the fourth inning after San Francisco's Buster Posey lost the bat swinging at a pitch. He was alert and speaking with medics as they worked on him and gave a thumbs up to the crowd as he was carried away.