A Woden Valley Rams junior, Priddis started his career with the Canberra Raiders, winning the club's rookie of the year award in his debut season.
Having won the 2000 NRL Premiership, the Broncos traveled to England to play against 2000's Super League V Champions, St Helens R.F.C.
Moving to the Penrith Panthers, in the 2003 NRL grand final, Priddis won the Clive Churchill Medal in the 18-6 victory over the Sydney Roosters.
As 2003 NRL premiers, the Panthers travelled to England to face Super League VIII champions, the Bradford Bulls in the 2004 World Club Challenge.
Despite being advised by Dragons coach Wayne Bennett to retire at the end of the 2009 season, Priddis went on to make his 300th NRL appearance in 2010.