 In 14 years as a senior and international footballer, Haddock was never booked, sent off, or even admonished by a referee.The latter match would prove to be his final international appearance, as despite his selection in the 1958 FIFA World Cup squad, he did not feature in the finals in Sweden.In addition to his six full international appearances, Haddock was also selected to play in seven Scottish League XI matches, winning on all seven of his appearances, with his solitary goal from the penalty sport against The Football League XI at Hampden Park.