Rubuta ci gaba don wannan sakin layi - Osano ya yi gasa ga Kenya tun yana ƙarami kuma a matsayin ɗan wasan ƙwallon ƙafa na ƙarami ya raba azurfa a ƙungiyar a gasar tsere ta ƙasa ta duniya ta 1987
(wanda mai nasara Wilfred Kirochi ya jagoranta) kafin ya dawo a 1989 don kammala na huɗu kuma ya taimaka wa Kenya zuwa taken ƙungiyar tare da masu lambar yabo ta mutum Kipyego Kororia da Stephenson Nyamau. Ya lashe lambar yabo ta mutum daya a gasar zakarun duniya ta matasa a shekarar 1988, inda ya shiga tseren kilomita 20, inda ya zama na biyu ga Zeleke Metaferia na Habasha.