Tuhia he haere tonu mo tenei whitianga - I tiimata a Kosgei i tana umanga a-ao hei kaikawe whakawhiti whenua me te kaiwhaiwhai. I rongonui ia hei kaitakaro rangatahi i te tau 1997 i te wa i riro i a ia te tohu parahi rangatahi i te 1997 IAAF World Cross Country Championships
, a ka tae atu ia ki te Whakataunga Whakataunga IAAF Grand Prix 1997 mo te 3000 mita steeplechase. I whakapumautia e ia tana whakapapa ma te whakatakoto i tetahi rekoata ao rangatahi mo te kaupapa.