Rubuta ci gaba don wannan sakin layi - Kemboi ya kasance wani ɓangare na ƙungiyar 4x400 relay da ta gama na biyar a gasar zakarun duniya ta 1991. Ya yi gasa a gasar Olympics a karo na farko a wasannin Olympics na 1992, yana shiga cikin mita 400, inda ya kai wasan kusa da na karshe. Ya kuma kasance wani ɓangare na tawagar Kenya 4x400
tawagar da ta kai wasan karshe, amma ba ta kammala ba. A gasar cin kofin duniya ta IAAF ta 1992, ya kasance wani ɓangare na ƙungiyar Afirka 4 × 400 m da suka lashe zinare.