Carrigan played for the Boston Red Sox between 1906 and 1916, and he was a player-manager for the last four of those seasons. In 1915 and 1916, Carrigan's teams won back-to-back World Series; he is the only Red Sox manager to accomplish that feat in franchise history. He was said to exert a positive influence on young Red Sox star Babe Ruth, serving as his roommate and his manager.
