The catcher’s box in baseball is an area in which the catcher must position themselves in preparation to catch the pitcher’s throw. The catcher’s box is located behind the home plate, and the catcher stands within the box behind the batter. A balk is given if the catcher does not stand within their boundaries during a pitch. Behind the catcher stands an umpire, whose job it is to watch whether the pitch is thrown through the strike zone.
The catcher’s box is 43 inches by 8 feet, making it a small area in comparison to the rest of the field.