Career
He is best known for winning the gold medal in the 800 m at the 2007 World Championships. Yego competed at the 2005 World Championships, but did not advance past 800 metres heats. A few weeks afterwards, he improved his 800 m personal best to 1:42.67 minimum in Rieti, finishing second behind David Rudisha who ran a new African record.
Personal bests 800 metres – 1:42.67 minimum (2009).