Justin Smith is part aboriginal I believe.
I had a feeling someone might have a go at suggesting Rod Jensen was ever part of the Cowboys backline, but that is stretching the truth for the sake of argument.
He played on the wing in round 1 2004 to cover for Ty Williams who was at fullback in place of the injured Matt Bowen.
In rounds 11, 14, 15 and 17 he was in the centres to cover for the injured Paul Bowman.
Then for the next 5 weeks he was named at fullback and wing for the five games where Matt Bowen played off the bench.
Then his next 44 appearances to date saw him start in the second row once (when the Cowboys smashed the Dogs on the Gold Coast in round 12 2005), in the centres once (round 17 2005 against the Warriors, covering for Origin absentees) and 42 games off the bench.
So it'd be better to say that through 2005, the Cowboys backline was:
Matt Bowen
Ty Williams
Josh Hannay
Paul Bowman
Matt Sing
Justin Smith
Johnathan Thurston
Although the halves could also be touted as being Thurston / Firman, that was the lineup for the rest of the finals series after Firman was starting halfback when the Wests Tigers belted us 50-6 in THAT qualifying final.