[6] Walker is credited with coining nicknames for several leading snooker players to use in his introductions.

Among these are The Magician for Shaun Murphy, The Force for Peter Ebdon and The Thunder from Down Under for Neil Robertson.

He has presented the Winmau World Masters in 2009 and reported at every BDO World Darts Championship from the Lakeside Country Club since 2010 alongside Colin Murray while presenting Darts Extra during the night.

In 2011, he joined the athletics team on Channel 4 which included the Indoor European Championships and World Championships alongside John Rawling, Iwan Thomas, Dean Macey, Katherine Merry, and Michael Johnson.

[7] He also commentated on Biathlon and Cross Country Skiing for Channel 4's Winter Paralympic Coverage.