Career
Motherwell and Celtic
Walker started his career with Motherwell in 1984 before moving to Celtic in the summer of 1987. The following 3 seasons were less fruitful however and by 1991-1992 Walker was out of the first team picture. Bolton
After loan spells with Newcastle United and Bolton Wanderers, he joined the Burnden Park side permanently in 1992.
Walker continued in the same vein the following season until sustaining a serious knee injury against Swansea City.
Glasgow
Upon his recovery, Walker was the subject of a surprise bid from Celtic and he returned to Glasgow in 1994. 1994-1995 was a mixed season for Walker.
In between these events though were the negatives, as the Hoops struggled in the League and suffered a shock defeat by Raith Rovers in the League Cup final. Due to the arrival of Andreas Thom in the summer of 1995, Walker was again deemed surplus to requirements at Parkhead and joined Sheffield United for £500,000 in early 1996.
Walker"s time in the Steel City was relatively productive.
His goals tally a respectable 24. Lower leagues
Nevertheless, Walker was again to quickly fall from favour, and after brief loan spells at Hibernian, where he scored in an Edinburgh derby, and Raith Rovers in 1998, he ended his career in the lower leagues. This period encompassed short spells with Ayr United, Carlisle United, Partick Thistle and Alloa Athletic.
Since his playing retirement, Walker has worked as a pundit for STV on their Scotsport highlights programme, which he became the main presenter of, alongside Grant Stott, due to Jim Delahunt"s departure.
The programme was axed in May 2008, due to increasing competition from British Broadcasting Corporation Scotland"s Sportscene. Walker is also writing a column for the Glasgow-based Sunday Mail newspaper.
Walker now regularly features on Sky Sports as a color commentator for Scottish Premiership and Cup games.