 Since Mack had not been on the Athletics' roster before September 1 as required by the rules, he was ineligible to play in the World Series—even if his father had been minded to play him.As a minor league player in 1910, Mack batted .135 in 26 games.From 1913 until 1915, Mack served as player-manager of the Raleigh team in the Class D North Carolina State League.