A fan was hit by a flying bat at Wrigley Field during the game between Pittsburgh and the Chicago Cubs on Monday night and carried from the stands on a stretcher.
There was no immediate report on the fan's condition.
Chicago rookie Addison Russell, playing his first game at Wrigley Field, lost control of his bat on a swing as he led off the bottom of the seventh inning. The bat flew into the seats between the Cubs' dugout on the third base side and the netting behind home plate.
Cubs owner Tom Ricketts was sitting about five rows below the fan, and asked a team trainer in the dugout for ice and a towel. Ricketts went over to assist the fan while paramedics were called.
A game between the two teams last week was delayed 23 minutes after a fan was hit in the back of the head by a foul ball.
The Cubs went on to beat the Pirates, 4-0.