Karoki akawana nzvimbo yechipiri pa2015 IAAF World Cross Country Championships achitevera Geoffrey Kipsang mushure mekutungamira chikamu chikuru chemakwikwi. Akamirira Kenya mumakwikwi emamita zviuru gumi pamakwikwi eWorld Championships muna 2015 uye akarasikirwa nemenduru pachinzvimbo chechina. Medals yakauya pa 2016 IAAF World Half Marathon Championships
, kwaakamhanyisa mumwe wake Geoffrey Kipsang Kamworor uye akagovana mukombe wechikwata.