Osano akakwikwidza kuKenya achiri mudiki uye semumhanyi wechidiki akagovana sirivheri yechikwata pa1987 IAAF World Cross Country Championships
(Achitungamirirwa nemukundi Wilfred Kirochi) asati adzoka muna 1989 kuti apedze wechina uye kubatsira Kenya kumusoro wechikwata pamwe chete nevakakunda menduru Kipyego Kororia naStephenson Nyamau. Akakunda menduru yemunhu mumwechete pa1988 World Junior Championships muAthletics, achipinda mumakwikwi e20K, kwaakange ari mumhanyi wechipiri kuEthiopia's Zeleke Metaferia.