Ku dhameystir weedhan soo socota: Waxay sameysay rikoorkeedii ugu fiicnaa ee Half Marathon 1:13:03
2005 IAAF World Half Marathon Championships oo ka dhacday Edmonton, Alberta, Canada. Markii ugu fiicnayd ee ay marathon-ka gasho waxay ahayd markii ay marathon-ka Nagano marathon-ka gashey sanadkii 2006, iyada oo leh waqti dhan 2:29:46. Rillstone wuxuu dhigay rikoor qaran oo loogu talagalay marathon-ka 2007 IAAF World Championships ee Osaka, Japan, oo leh waqti dhan 2:33:58, isagoo ku dhammeeyay kaalinta saddex iyo tobnaad.