A defender with an eleven-year professional career, he played 185 competitive games, including 158 appearances in the English Football League.
In the following season, he made only a handful of appearances for Crewe and was loaned to Southern League side Halesowen Town for a month in March 2001 to play more first-team games.
[8][9] His form for the "Dragons" in just three appearances impressed to the extent that Liverpool striker Craig Bellamy added money to the pot collected to pay the defender whilst at the Racecourse Ground.
[10] He returned to Vale Park in the summer, but was a peripheral figure during the 2007–08 season, and was released in January 2008 after suffering problems with tendinitis in his knee.
His form in his ten games impressed manager Keith Alexander sufficiently to win Walker a twelve-month contract in June 2008.
With his contract coming to an end at Moss Rose in May 2009,[13] he made contact with Hednesford Town manager Dean Edwards, who was in the market for an experienced player to become part of the coaching staff at Keys Park after Matt Elliott's departure.