Rubuta ci gaba don wannan sakin layi - Ta gama ta bakwai a tseren tsere mai tsawo a Gasar Tsere ta Duniya ta 2004, yayin da kungiyar Kenya, wacce Jepkorir ta kasance wani bangare, ta lashe lambar azurfa a gasar kungiyar. Ta lashe gasar Parelloop 10K a tseren a Netherlands a shekarar 2005. Ta gama goma sha huɗu a gasar tseren tsere ta duniya ta 2006
, yana taimakawa tawagar Kenya ta lashe gasar tawagar. Ta lashe 2007 Cross Internacional de la Constitución.