Born and raised in Launceston, Tasmania, Walker attended West Launceston Primary School, Riverside High School and Launceston College before moving to Canberra in 2003 to attend the Australian Institute of Sport.
The following year, he moved to the United States to attend Montana State University Billings. As a freshman in 2004–05, he was named the Pacific West Conference Freshman of the Year after averaging 15.5 points and 5.8 rebounds in 20 games (17 starts).
In 2006, Walker transferred to Saint Mary’s College of California. After redshirting the 2006–07 season due to NCAA transfer rules, he appeared in 25 games off the bench for the Gaels in 2007–08, averaging just 9.3 minutes per game. In those 25 games, he averaged 3.2 points and 2.4 rebounds per game. In his final year in 2008–09, he played 25 games (8 starts) and averaged 2.7 points and 1.6 rebounds per game.
Walker was runner-up ‘Rookie of the Year’ in the 2010/11 NBL season.
Joining the 36ers for the 2015/16 season after a career with Melbourne where he was a crowd favourite with his athletic dunks and hassling defense.
“For us he’ll definitely play multiple positions and I’ll use him the way I did Sam Mackinnon (in Brisbane’s championship season) guarding one through five. He’ll play some ‘point forward’ for us and pull opposition bigs away from the rim.” said coach, Joey Wright “And he’s a great energy guy and a great teammate.”
Mostly cast as a small forward, he has played 131 NBL games and last season averaged 7.5 points at 50 per cent, 5.1 rebounds and 1.0 assists coming off the bench for United.
“He will join us after he concludes his SEABL commitments with Dandenong,” Wright said.