| Personal records |
| Outdoors: 800m - 1:42.54 (2012), All-Time World No. 10, All-Time Kenya No. 4, National Junior Record 1000m - 2:17.96 (2012) Indoors: 800m - 1:45.96 (2012) |
| Career highlights |
| 2013 |
| Outdoors: 9th - IAAF Diamond League Doha 800m (1:46.54) Indoors: 3rd - Stockholm 800m (1:47.61) |
| 2012 |
| Outdoors: 3rd - Olympic Games London 800m Final (1:42.54) 2nd - Kenyan Olympic Trials Nairobi 800m Final (1:43.94) 2nd - Hengelo 800m (1:44.00) 2nd - IAAF World Junior Championships Barcelona 800m Final (1:44.56) 2nd - Olympic Games London 800m Semi-Final (1:44.63) 4th - IAAF Diamond League Rome 800m (1:45.15) 7th - IAAF Diamond League Zurich 800m (1:45.18) 1st - Budapest 800m (1:45.39) 2nd - Olympic Games London 800m Heat (1:45.72) 2nd - IAAF Diamond League Shanghai 800m (1:46.20) 3rd - Dubnica 1000m (2:17.96) End-of-Outdoor-Season World Rank (by time): 800m - 3rd; 1000m - 14th Indoors: 2nd - Lievin 800m (1:45.96) 1st - Stockholm 800m B-section (1:46.81) 3rd - IAAF Indoor World Championships Istanbul 800m Semi-Final (1:48.23) 1st - IAAF Indoor World Championships Istanbul 800m Heat (1:49.57) End-of-Indoor-Season World Rank (by time): 800m - 5th |
| 2011 |
| 3rd - IAAF World Youth Championships Lille 800m Final (1:44.98) 2nd - IAAF World Youth Championships Lille 800m Semi-Final (1:48.80) End-of-Season World Rank (by time): 800m - 26th (Junior World Rank - 4th) |
