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. Because baseball practices permanent substitution, these pitchers frequently pitch to a very small number of batters in any given game (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
Gu
Y), a term that can be used pejoratively and which was coined by
John Sickels.