Left-handed specialist
In baseball, a left-handed specialist (also known as lefty specialist) is a relief pitcher who throws left-handed and specializes in pitching to left-handed batters, weak right-handed batters, and switch-hitters who bat poorly right-handed.[1] Because baseball practices permanent substitution, these pitchers frequently pitch to a very small number of batters in any given game (historically, often only one), and rarely pitch to strictly right-handed batters. Most Major League Baseball (MLB) teams have several left-handed pitchers on their rosters, at least one of whom is a left-handed specialist. A left-handed specialist is sometimes called a LOOGY (or Lefty One-Out GuY), coined by John Sickels, and may be used pejoratively.[2][3]
"LOOGY" redirects here. For other uses, see Loogie (disambiguation).Pitching style[edit]
The pitcher generally has an advantage when his handedness is the same as the batter's, and the batter has an advantage when they are opposite.[4] This is because a right-handed pitcher's breaking balls move to the left from the pitcher's perspective, which causes it to cross the plate with its lateral movement away from a right-handed batter but towards a left-handed batter (and vice versa for a left-handed pitcher), and because batters generally find it easier to hit a ball that is over the plate. Furthermore, since most pitchers are right-handed, left-handed batters generally have less experience with left-handed pitchers. A left-handed pitcher may also be brought in to face a switch-hitter who generally bats left-handed, forcing the batter to shift to his less-effective right-handed stance or to take the disadvantages of batting left-handed against a left-handed pitcher. Research from 2011 to 2013 has shown that a pinch hitter (usually right-handed) is often used when a left-handed reliever is inserted in the game, thereby reducing or negating the pitcher's platoon split advantage. Only a handful of left-handed relievers face a higher percentage of left-handed batters than right-handed batters over the course of a season.[5]
Right-handed specialist[edit]
The right-handed specialist (sometimes called a ROOGY, for Righty One-Out GuY) is the less common vice versa contrast to the left-handed specialist, due to there being a higher percentage of right-handed batters and pitchers in Major League Baseball,[14] but they are occasionally featured.[15][16]