Coach (baseball)
In baseball, a number of coaches assist in the smooth functioning of a team. They are assistants to the manager, or head coach, who determines the lineup and decides how to substitute players during the game. Beyond the manager, more than a half dozen coaches may assist the manager in running the team.
Roles of professional baseball coaches
Baseball is unique in that the manager and coaches typically all wear numbered uniforms similar to those of the players. Notable exceptions to this were Baseball Hall of Fame manager Connie Mack, who always wore a black suit during his 50 years at the helm of the Philadelphia Athletics, and Burt Shotton, manager of the Brooklyn Dodgers in the late 1940s, who wore a Dodger 200 cap and a team jacket over street clothes in the dugout. After the widespread adoption of numbered uniforms in the early 1930s, Joe McCarthy, another Hall of Fame manager, wore a full uniform but no number on his back for the remainder of his career (with the New York Yankees, then the Boston Red Sox). Coincidentally, all three men retired during or after the same season — 1950.