Career
Born in Kenya"s Nandi District, Chumba worked as a gardener until he decided to focus on running professionally. He began working with Claudio Berardelli in Kapsabet in 2008. His first marathon outings came in 2010 and he was runner-up at both the Madrid Marathon and the Italian Marathon.
He was faster still at the Frankfurt Marathon in October, running 2:07:23, although the close to world record pace meant he finished seventh.
Victory came at the Eindhoven Marathon as he surged away in the second half of the race. He started the 2013 Xiamen race quickly, but dropped out after an ill-timed surge to the front.
He placed seventh at the 2013 and then came eighth at the Amsterdam Marathon in October.