SECTION 2 APPEAL PLAY
A play in which an umpire cannot make a decision until requested by a manager, coach or player. The appeal must be made before the next legal or illegal pitch, or before all infielders (including the pitcher) have left the field (crossed the foul lines). The appealed play does not change the type of out that is being appealed. There is such a thing as a fourth out appeal. This appeal is only done in order to prevent a run from scoring.