In
baseball, an
off-speed pitch is a
pitch thrown at a slower speed than a fastball. Collectively, all off-speed pitches are known as junk.
Breaking balls and
changeups are the two types of off-speed pitches. The goals of off-speed pitches vary. Some are to get the batter off balance, have him swing early, and to make the
fastball seem faster to the
batter. A majority of pitchers will have at least one off-speed pitch in their repertoire.
References