Walker played with Footscray as a back pocket. He was an excellent mark with a good football brain.
Walker played 72 games for Footscray (1959–65), won the Walker won Footscray's 1963 best and fairest award and was selected to represent Victoria.
In 1966 Walker moved to Tasmania to pursue coaching. He was a premiership captain coach during his six years in Tasmania.
From 1972 to 1987 Walker worked as a commentator for Channel 9 and on ABC Radio.
His football credentials include five years (1981–85) as a VFL state selector and three years as chairman of selectors for the Footscray Football Club. Walker was awarded life membership of the club in 1999.
Walker is a current Bulldogs hall of fame selector.
Victoria (VFL) 26.24 (180) defeated Tasmania 11.13 (104), at North Hobart Oval, 9 June 1966, crowd: 20,047 Tasmania 19.27 (141) defeated Victoria (VFA) 7.11 (53), at North Hobart Oval, 11 June 1966, crowd: 23,764 Western Australia 17.13 (115) defeated Tasmania 16.10 (106), at North Hobart Oval, 16 June 1966, crowd: 10,199 South Australia 14.7 (91) defeated Tasmania 9.13 (67), at North Hobart Oval, 18 June 1966, crowd: 23,368