Dee ihe na-aga n'ihu na paragraf a - Onye na-agba ọsọ na mahadum (ọ mebiri ihe ndekọ Olympic nke Wyndham Halswelle dị afọ 53 nke Scotland na mita 300 na 1961), Campbell sooro ndị otu Great Britain na 200 mita na 4 × 100 mita relay
na 1964 Olympic Games na Tokyo, ma bụrụkwa onye isi ndị otu Scotland na 1966 British Empire na Commonwealth Games na Kingston, Jamaica. Ọ bụkwa onye isi ndị otu egwuregwu bọọlụ Great Britain n'afọ 1965 na 1966, ma jide ndekọ 100 mita nke Britain site na 1967 ruo 1974. N'otu oge a maara ya dịka "nwoke ọcha kachasị ọsọ n'ụwa", na-agba ọsọ 100m na 10.2 sekọnd ugboro abụọ n'afọ 1967. N'ọsọ nke mbụ ya nke were sekọnd 10.2 o meriri O. J. Simpson, onye bụ mgbe ahụ onye na-achọ ịghọ onye na-eme egwuregwu.