off-speed pitch(n = noun.act) change-of-pace, change-of-pace ball, change-up - a baseball thrown with little velocity when the batter is expecting a fastball;
is a kind of delivery, pitch

absolute pitch, auction pitch, concert pitch, fever pitch, high pitch, international pitch, low pitch, mineral pitch, northern pitch pine, overhand pitch, perfect pitch, philharmonic pitch, pitch, pitch accent, pitch apple, pitch black, pitch blackness, pitch contour, pitch in, pitch into, pitch pine, pitch pipe, pitch shot, sales pitch, submarine pitch, wild pitch