Pedzisa mutsara unotevera: Muna 1983, Nzau ndiye akava muKenya wokutanga kukunda mumutambo wemarathon wepasi rose paakakunda muChicago Marathon muna 1983. Gore rakatevera, Nzau akapedza ari wechinomwe mumakwikwi aya
nhangemutange yemarathoni yevarume paMitambo yeOlympic yeZhizha ya1984. Mukuwedzera kumakwikwi emarathon, Nzau akapedza ari wechi14 pavanhu 16 vakapedza mumakwikwi evarume emamita 10 000 pamakwikwi mamwe chetewo. Muna 1990, Nzau akakunda Belgrade Marathon yokutanga.