 Although never a prolific scorer, at Cardiff Malloy was more famed for his scoring feats at the wrong end of the field, scoring a total of fourteen own goals during his six years at the club, including netting two in one match during a 3–2 victory over Liverpool on 22 August 1959.His only league goal for the club came from the penalty spot in the 1956–57 season in a 3–1 defeat to Manchester United.He took over as captain of the side during the 1959–1960 season as Cardiff gained promotion to the top flight as runners up to Aston Villa.