In baseball, a catcher is charged with a passed ball when he fails to hold or control a legally pitched ball that, with ordinary effort, should have been maintained under his control, and, as a result of this loss of control, the batter or a runner on base advances. A runner who advances due to a passed ball is not credited with a stolen base unless he breaks for the base before the pitcher begins his delivery. A passed ball may be scored when a runner on first, second, or third base reaches the next base on a bobble or missed catch by the catcher, or when the batter-runner reaches first base on an uncaught strike three (see also Strikeout).