Born in Migori District, Onyango began playing football in the Kenyan Premier League with Hakati Sportiff in 1980 before joining Gor Mahia F.C.
In 1990, he joined Kisumu Posta, the club he would finish his playing career with in the 1994.
[2] Onyango made several appearances for the Kenya national football team, including six FIFA World Cup qualifying matches.
He also won a silver medal with Kenya at the 1987 All-Africa Games in Nairobi.
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