He entered the University of Melbourne in 1997, where he was a resident at Trinity College, and in 2015, he gave the Cordner Oration at Grand Final Breakfast held at Trinity College.
[1] Walker was drafted from the North Ballarat Rebels with the sixth selection in the 1997 National Draft and made his AFL debut against Essendon at Subiaco Oval in round 19, 1998.
He played over 150 games for Fremantle, the first Victorian born player to do so.
[2] When not selected for the Fremantle side, he played for the Peel Thunder in the West Australian Football League, after initially playing for East Perth.
[3] Walker was delisted by Fremantle at the end of the 2007 season and chose to participate in the 2007–08 Clipper Round the World Yacht Race on board the yacht westernaustralia2011.com for the race leg across the Southern Ocean between Durban and Fremantle.