| Code | |
|---|---|
| Gender | Male |
| Full name | Duncan•Cheruiyot Koech |
| Used name | Duncan•Koech |
| Born | 28 December 1981 |
| Sport | Competition | Host City | Country | Event | Placement | Country | |
|---|---|---|---|---|---|---|---|
| Athletics | 2008 Marathon Hannover | Hannover | Marathon, Men | 🥇 | |||
| Athletics | 2012 Marathon Köln | Köln | Marathon, Men | 🥉 | |||
| Athletics | 2013 Marathon Köln | Köln | Marathon, Men | 🥉 | |||
| Athletics | 2015 Marathon Wien | Wien | Marathon, Men | 🥈 | |||
| Athletics | 2018 Marathon Hannover | Hannover | Marathon, Men | 🥉 |