John Joseph McGraw was an American Major League Baseball (MLB) player and manager who was for almost thirty years manager of the New York Giants. He was also the third baseman of the pennant-winning 1890s Baltimore Orioles teams, noted for their innovative, aggressive play.

In baseball, the field manager is the equivalent of a head coach who is responsible for overseeing and making final decisions on all aspects of on-field team strategy, lineup selection, training and instruction. Managers are typically assisted by a staff of assistant coaches whose responsibilities are specialized. Field managers are typically not involved in off-field personnel decisions or long-term club planning, responsibilities that are instead held by a team's general manager.