In baseball statistics, a putout (PO) is awarded to a defensive player who records an out by one of the following methods:Tagging a runner with the ball when the runner is not touching a base Catching a batted ball on the fly Retrieving a batted ball hit along the ground which a defensive player subsequently throws to another defensive player who then catches it- the latter simultaneously occupying a base, or by subsequently touching a base while in possession of the ball- thus recording an out of a batter or runner, before the batter, or non-batting runner, can touch the base to which he is compelled to advance. Catching a thrown ball and tagging a base to record an out on an appeal play Catching a third strike Being positioned closest to a runner called out for interference