Ramba uchiverenga ndima ino - Walker akatanga kukwikwidza kuGibraltar pa2000 IAAF World Cross Country Championships
muVilamoura, Portugal uko akaisa 158th munhangemutange yevakuru vevarume munguva ye46:48 uye akapedza 149th munhangemutange pfupi yevarume munguva ye14:15. Gore rakatevera pa 2001 Island Games muIsle of Man, Walker akapedza 4th mu triathlon yevarume yega yega nenguva 2:06:30. Pamusangano mumwe chetewo, Walker akarekodhawo nguva yake yakanakisisa uye yenyika ye10: 34.95 mumagumo e3000 m steeplechase. Muna Chikunguru 2002, Walker akaita kutanga kwake paCommonwealth Games nekukwikwidza muvarume triathlon pa2002 Manchester Games. Akapedza nhangemutange yacho muna 2:06:15.19 ndokuva wechi 26. Mwedzi mitatu gare gare, Walker akakwikwidza mu2002 Ironman World Championship muHawaii. Akapedza 160th kunze kwe280 mu35<unk>39 zera kupatsanurwa uye 767th kunze kwe1605 yakazara nenguva ye11: 22:55. Muna 2003 Island Mitambo muGuernsey, Walker akahwina sirivha mu triathlon yevarume uye pamwe naHarvey Gurry naAnthony Perera vakapedza 6th mumutambo wechikwata.