|2010 Delhi||400 m|
|2010 Delhi||4x400 m relay|
|2011 Maputo||4x400 m|
|2011 Maputo||400 m|
|2010 Nairobi||4x400 m relay|
|2012 Porto Novo||4x400 m relay|
|2014 Marrakech||4x400 m relay|
|2010 Split||4x400 m relay|
In 2010 he was part of the Kenyan 4x400 metres relay team that won gold at the 2010 African Championships in Athletics. In the individual event he was fourth, despite recording the same time as bronze medallist Gary Kikaya of DR Congo.
Mutai was part of the African 4x400 metres relay team that finished third at the 2010 IAAF Continental Cup.
|2009||World Championships||Berlin, Germany||43rd (h)||400 m||47.04|
|2010||African Championships||Nairobi, Kenya||4th||400 m||45.28|
|1st||4x400 m relay||3:02.96|
|Continental Cup||Split, Croatia||3rd||4x400 m relay||3:02.62 |
|Commonwealth Games||New Delhi, India||1st||400 m||45.44|
|2nd||4x400 m relay||3:03.84|
|2011||World Championships||Daegu, South Korea||6th||4x400 m relay||3:01.15|
|All-Africa Games||Maputo, Mozambique||3rd||400 m||46.52|
|1st||4x400 m relay||3:03.10|
|2012||African Championships||Porto Novo, Benin||15th (sf)||400 m||47.35|
|3rd||4x400 m relay||3:04.12|
|2014||IAAF World Relays||Nassau, Bahamas||15th (h)||4x400 m relay||3:04.69|
|Commonwealth Games||Glasgow, United Kingdom||31st (h)||400 m||47.60|
|–||4x400 m relay||DQ|
|African Championships||Marrakech, Morocco||9th (sf)||400 m||46.77|
|3rd||4x400 m relay||3:07.35|
- dbresults.net: 2010 African Championships in Athletics – 400 m Men – Final Archived 2011-07-23 at the Wayback Machine.
- IAAF, June 29, 2009: 10,000m dominated by Police squad – Kenyan Champs, Day 3 Archived 2010-11-19 at the Wayback Machine.
- Representing Africa