He went on to make 475 appearances in all competitions for Walsall in eleven years,[4] the most by any goalkeeper for the club and became a cult hero at Bescot Stadium.

[5] Walker, who provided competition for Stephen Bywater,[6] was the second choice goalkeeper at Upton Park but gained a regular first team place within a year of his arrival.

[7] Walker helped West Ham win promotion in 2005, but a serious knee injury in the closing stages of the play-off final[8] saw him miss the majority of the 2005–06 season.

[9] He made only two more first team appearances, though collected a FA Cup Final runners up medal as an unused substitute in May 2006.

[10] The presence of Roy Carroll and Robert Green as goalkeepers at West Ham during the 2006–07 season meant that Walker's first-team chances were limited; in spite of this, he still remained a popular figure at Upton Park.

[11] He made his debut for Colchester on 29 November 2008 in their 2–1 victory against Northampton Town[12] and played 16 times for the club before returning to West Ham.

[13] At the start of September 2009, at the age of 36, Walker was signed on a short-term contract by Tottenham Hotspur as a third choice goalkeeper.

[18] In July 2012, Walker signed a fresh one-year deal with Walsall which saw him working in a player-coach role with the League One club.

On 7 February 2013, after making 533 appearances for the club during two separate spells over the past two decades, Walker left Walsall by mutual consent.