Kammala wannan jumla: Okyir ya lashe lambar azurfa 4 x 100 mita a gasar Olympics ta duniya
Wasannin Afirka na 1973 da Wasannin Commonwealth na 1974 na Burtaniya. Yana riƙe da rikodin Afirka don tseren mita 100, yana saita alamar 9.40 seconds a Austin a 1974.