Faatumu le fuaiupu lenei: I lana ta'amilosaga sa sainia, na manumalo ai Kipyegon i pine auro i le 2011 World U18 Championships, ma le 2012 World U20 Championships. I le 18 o ona tausaga, e leʻi ausia ai e ia le semi-final o le 2012 London Olympics, ae na manumalo i tuuga a le autalavou i le 2011 ma le
2013 World Cross Country Championships, ma faʻaiʻu lona 5 i le 2013 World Championships.