The changeup is another basic pitch that every pitcher learns at the lowest levels, because good hitters will catch up to a fastball sooner or later.
The theory behind a changeup is it comes with the same arm position and motion as a fastball, but is 10-15 mph slower based on the drag on the ball. And they make any fastball seem faster by comparison.
There are two basic changeups – the three-fingered changeup and the circle change.
