Career
He represented his country in the same event at the 2008 Summer Olympics. He holds the 10 miles world junior record of 44:51. He trains with Parliamentary Assembly of the Council of Europe Sports Management.
He was schooled at Sipili secondary school.
He gained selection for the 2011 World Championships in Athletics and came fifth for Kenya in the men"s 10,000 m. That year, Mathathi set a course record for the Great North Run half marathon, finishing in a time of 58 minutes 56 seconds.
At the start of 2012 he finished second at the Chiba Cross Country meet. Mathathi attempted to run the fastest marathon debut at the Fukuoka Marathon but he dropped out of the race after 38 km.
Personal bests 5000 metres - 13:03.84 minimum (2004).