Mezue ahịrịokwu na-esonụ: Adamson ruru eru maka
marathon na 1984 Olympic Games, ebe ọ gbara 52nd na oge 2:25:02. Ka afọ ahụ na-aga, a na-eme atụmatụ ya ịsọ mpi na 1984 New York City Marathon, mana ọ kwụsịrị tupu mmalite ahụ n'ihi ihu igwe na-ekpo oke ọkụ. N'otu afọ ahụ, o meriri na 1984 Philadelphia Marathon na oge nke 2:16.39, ihe ndekọ mba Jamaica na ihe omume ahụ. Na 1985, Adamson meriri ihe omume ahụ maka afọ nke abụọ n'usoro na oge nke 2:18:27, nkeji 5 na 13 sekọnd n'ihu onye ọ bụla ọzọ. Mgbe agbụrụ ahụ gasịrị, Adamson kwuru na ya nwere olile anya ịgba ọsọ ọsọ ọsọ karịa, mana ifufe mere ka ọ dị nwayọ. Adamson gbara asọmpi marathon n'egwuregwu Olympic nke afọ 1988, wee nọrọ n'ọkwa nke iri asatọ na anọ, ọ gbakwara ọsọ mita puku iri n'egwuregwu Commonwealth nke afọ 1990, ebe ọ nọrọ n'ọkwa nke itoolu.