Whakakī i te rerenga e whai ake nei: He kaiwhakatere angitu i te whare wānanga (i pakaru i a ia te tohu koura o te Olympic a Wyndham Halswelle 53-tau te pakeke o Scotland 300 i te 1961), i whakataetae a Campbell mo te kapa Great Britain i te 200 mita me te
4 × 100 mita relay i nga Taakaro Orimipia 1964 i Tokyo, me te rangatira o te kapa Scotland i te 1966 British Empire me Commonwealth Games i Kingston, Jamaica. Ko ia hoki te rangatira o te roopu hakinakina o Great Britain i te tau 1965 me te 1966, a i mau ia i te rekoata 100 mita o Ingarangi mai i te 1967 ki te 1974. I tetahi wa i mohiotia ia ko "te tangata ma tino tere i te ao", e rere ana i te 100 mita i roto i te 10.2 hēkona e rua i te tau 1967. I tana whakataetae tuatahi 10.2 hēkona i hinga ia i a O. J. Simpson, i te wa e hiahia ana ia ki te kaitakaro.