What is a pitch that is dropped during delivery but crosses a foul line called?

A pitch that is dropped during delivery but crosses a foul line is classified as a ball. In baseball, a pitch is generally considered a ball if it does not enter the strike zone and is not swung at by the batter. When a pitcher drops the ball during the delivery and it still crosses a foul line, it is not deemed a strike because the act of dropping it during the pitch indicates that it has not been delivered according to the proper mechanics.

The rules state that if the pitcher does not deliver the ball properly, such as by dropping it, the pitch is ruled a ball. This maintains the integrity of the game and ensures that all pitches are delivered in a standard manner. A dropped pitch does not contribute to the game in the same way a legal pitch would, and thus is not counted as a foul ball, strike, or no pitch.