Clifford made his first-grade debut for Illawarra in round 6 of the 1996 ARL season against South Queensland at WIN Stadium.
In the 1997 ARL season, Clifford played 23 matches and finished as Illawarra's top try scorer with 14 tries as the club qualified for the second finals series.
Clifford played in Illawarra's elimination finals loss to the Gold Coast Chargers.
In the 1998 NRL season, Clifford played 12 matches in what would be Illawarra's final year in the competition.
This rugby league football biography relating to an Australian born in the 1990s is a stub.