 He was selected to play on the interchange bench for Widnes in their 1989 World Club Challenge victory over the Canberra Raiders.Moriarty also gained caps for the Great Britain Lions against Papua New Guinea in 1991 and France in 1994.He transferred from Widnes to Halifax for the 1994-95 Rugby Football League season, and was included in the Wales squad for the 1995 Rugby League World Cup, he also played for South Wales on loan.