- His birth names are Opiyo Taiwo Leo Awuonda
- He was born on the 6th of August 1985 in Brixton
- He previously played in the Football League for Walsall, Rochdale, Chester City, Darlington, Torquay United and Barnet and in the USL First Division for the Puerto Rico Islanders and Rochester Rhinos.
- He had loan spells at Rochdale,[4] Chester City,[5] Kidderminster Harriers,[6] and Darlington.[7] Atieno was released by the club at the end of the 2005–06 season following their relegation from League One
- He first appeared for the Kenya national team in June 2009.
- Atieno is the son of Moussa Awuonda, a former Nation Newspapers correspondent
- He began his football career at the age of 15 with Walsall F.C
- He moved to the US to join USL First Division team Puerto Rico Islanders after the 2006-2007 season.
- In January 2009 Atieno declared his desire to play for the Kenya national football team, telling a reporter for the Kenyan newspaper Daily Nation “It has been my dream to play for Kenya since I was 13”
- Atieno has an identical twin brother, Kehinde Roberts, who plays basketball at West Chester University of Pennsylvania