Catcher is a position played in baseball. The catcher crouches behind home plate and receives the ball from the pitcher. In the numbering system used to record defensive plays, the catcher is assigned the number 2 (see Baseball scorekeeping).
Catching is arguably the most difficult and important task in baseball. Positioned behind home plate, the catcher can see the whole field, and therefore is in the best position to direct and lead the other players in a play. The catcher typically calls the pitches by means of hand signals, and therefore requires awareness of both the pitcher's mechanics and strengths and the batter's weaknesses. In addition, because the catcher's job is to catch pitches which often come in at speeds exceeding 90 miles per hour, the catcher wears protective equipment including a mask, chest protector, knee pads, and an extra-thick glove (see photo).
Catchers virtually always throw with their right hand. Since most hitters are right-handed and thus stand on the left side of the plate, a catcher who throws left-handed would often have to avoid these right-handed hitters for most of his throws from behind the plate. Thus players who throw left-handed never play catcher(external link to article on left-handed catchers). Lefty catchers have only caught 11 big-league games since 1901. (Some, including the famed statistician Bill James, have suggested that the real reason that there are no left-handed catchers is because lefties with a strong throwing arm are almost always turned into pitchers).
Catchers also have an increased risk of circulatory abnormalities in the catching hand. A study of minor-league ballplayers showed that, of 36 players in various positions, all 9 of the catchers had hand pain during a game and several had chronic pain in the catching hand. Ultrasound and blood pressure tests showed altered blood flow in the glove hand of five of the catchers, a higher proportion than the other baseball positions in the study. (Ginn, et al., 2005)
Catchers in baseball use the following equipment to help prevent injury while behind the plate:
Given the physical punishment often suffered by catchers, the equipment associated with the position is often referred to as "the tools of ignorance".
Baseball positions | Softball | Major league catchers
Catcher | Receptor (béisbol) | 捕手 | 捕手