Career
Opiyo made his Kenyan Premier League debut playing as a central defender for Mathare United in 1999. He played for Mathare United until 2003, finishing runner-up in the league"s player of the year voting in 2001. After a brief spell with Tusker in 2003, Opiyo moved to South Africa to sign with Premier Soccer League side Free State Stars.
The following season he joined Umtata Bush Buckinghamshire, but he was suspended by the league following a failed drugs test in February 2005.
Opiyo returned to Kenya where he begin playing club football again with Sofapaka in 2007. A year later, he joined Bandari, where he would play until retiring.