As the Giants, the team won the 1931-1932 ASL championship. By that time, the league was collapsing. The Giants lasted through the spring 1932 season before folding. It appears that at that time, Gallagher moved to the New York Field Club. He then played for Malta United on Long Island through at least December 1933. He then moved west to sign with Cleveland Slavia. He remained with them through at least 1934 as he was listed with Slavia on the 1934 World Cup roster. At some point, he moved to Cleveland Graphite Bronze where he finished his career.