Cutter (baseball)

In baseball, a cutter, or cut fastball, is a type of fastball which breaks slightly toward the pitcher's glove side as it reaches home plate. This pitch is somewhere between a slider and a fastball, as it is usually thrown faster than a slider but with more motion than a typical fastball. Some pitchers use a cutter as a way to prevent hitters from expecting their regular fastballs. A common technique used to throw a cutter is to use a four-seam fastball grip with the baseball set slightly off center in the hand. When a batter is able to hit a cutter pitch, it often results in soft contact and an easy out, due to the pitch's movement keeping the ball away from the bat's sweet spot. The cutter is typically 2–5 mph slower than a pitcher's four-seam fastball. In 2010, the average pitch classified as a cutter by PITCHf/x thrown by a right-handed pitcher was 88.6 mph; the average four-seamer was 92.1 mph.

Professional practitioners

The New York Yankees' former closer Mariano Rivera, one of the foremost practitioners of the cutter, made the pitch famous though the pitch itself has been around since at least the 1950s.