Koko played for the Samoa national rugby union team, making his debut in 1983.
He was invited to trial for the All Blacks but decided to stick with his native Samoa.
[6] Koko also spent time with the Boroondara Rugby Club in Australia.
Koko joined the Sydney City Roosters in the Australian Rugby League competition and led the Western Samoa team at the 1995 World Sevens.
Koko also had a stint with the Narrandera Lizards in Group 20 Rugby League[failed verification].