Foul ball

In baseball, a foul ball is a batted ball that:

  • Settles on foul territory between home and first base or between home and third base, or
  • Bounces and then goes past first or third base on or over foul territory, or
  • Has its first bounce occur in foul territory beyond first or third base, or
  • Touches an umpire or player, or any object foreign to the natural ground, while on or over foul territory. By interpretation, a batted ball that touches a batter while in his batter's box is foul regardless of whether it is over foul territory.

The entirety of the batted ball must be on or over foul territory in order to be adjudged foul in the above situations; otherwise it is a fair ball that forces the batter to attempt to reach first base.

A foul fly shall be judged according to the relative position of the ball and the foul line, including the foul pole, and not as to whether the fielder is on foul or fair territory at the time he touches the ball. If the foul ball gets caught, then it would be judged as an out.

Additionally, ballpark ground rules may specify that batted balls striking certain fixed objects such as railings, nets, or a roof if present are foul balls.