changeup is a type of pitch in baseball. Other names include change-of-pace and simply change. The changeup is sometimes called an off-speed pitch, although that term can also be used simply to mean any pitch that is slower than a fastball. As pitchers age, some learn to greatly extend their careers after losing speed on their fastballs by taking advantage of the differences in speed between an effective changeup and a fastball of any speed. One such pitcher is Trevor Hoffman, who is renowned for a devastating changeup combined with an average speed fastball.