Date of Birth: 
About Duncan Koech
- Duncan Cheruiyot Koech (born 28 December 1984) is a male long-distance runner from Kenya.
- His personal best is 2:07:53 achieved at 2012 Cologne Marathon.
- He came third at the 2013 Cologne Marathon.
- He has won marathons in Riga, Bucharest and Hannover.
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