[2] He had played junior football for East Fremantle and represented Western Australia at Under 16 and Under 18 levels.
[3] Walker received a 2022 AFL Rising Star nomination for his round 13 performance against Hawthorn at Optus Stadium, collecting 16 disposals and kicking a goal.
However, Walker suffered a knee injury in Round 18 against Collingwood after landing awkwardly during a marking contest,[5] and as a result was ruled out for the remainder of the season.
[7] Brandon returned to the Fremantle line-up for their second game of the 2024 AFL season against North Melbourne at Marvel Stadium.
[8] He was one of Fremantle's best players in round 9 during their disappointing loss to the Sydney Swans at Optus Stadium, collecting 19 disposals and kicking an impressive goal from outside the fifty-metre line.