He represented Western Australia at both under-16 and under-18 level respectively, in addition to also making his senior debut for  in the West Australian Football League (WAFL) as well, playing two games early in the 2003 season. Priddis became a regular in Subiaco's senior side during the 2004 season. He played 21 games, including Subiaco's win over  in the Grand Final, en route to ultimately being named the WAFL's Rising Star at the end of the season.
Priddis represented Western Australia in both under-16 and under-18 competitions, making his senior debut for the West Australian Football League (WAFL) in 2003. He became a regular player for Subiaco's senior team during the 2004 season, playing 21 games including their Grand Final victory against [opponent name].  He was awarded the WAFL's Rising Star award at the end of the season.