Connie Mack played for the Washington Statesmen (1886-1889), Buffalo Bisons of the Players League (1890), and the Pittsburgh Pirates (1891-1896). Mack is best known, however, as a manager. He managed the Pirtaes (1891-1894) and the Philadelphia Athletics (1901-1950). He was inducted into the National Baseball Hall of Fame in 1937. Robert McRay was the secretary of the American Base Ball Club of Philadelphia.
From the description of Letter, 1906, April 16. (National Baseball Hall of Fame). WorldCat record id: 47836386