An Infield Fly is a fair fly ball (not a line drive or bunt) that, in the judgment of the umpire, can be caught by an infielder, pitcher, or catcher with ordinary effort and when there are runners on first and second or first, second, and third and less than two outs. When the umpire calls "infield fly” the batter is out, regardless of whether the ball is subsequently caught or dropped. The ball is live, and runners already on base may advance (at their own risk) if the ball is not caught or tag up and advance if it is caught.
