 He played for the Galt Terriers of the semipro Intercounty League in southern Ontario in the summer of 1949.During the seventh game of a league semifinal series versus the Brantford Red Sox, Warren, playing center field, badly misplayed a routine fly ball late in the game that allowed Brantford to take the lead.Suspicions linger to this day about the honesty of Warren's efforts in that crucial game.