Whakaotihia te rerenga e whai ake nei: Ko te wa o te tau 2014 he taahiraa ki muri i te ara mo Cheptai, i te mea i mutu ia i nga whakataetae Diamond League, a, kaore i pai ake i a ia. Heoi, i ahu whakamua ia i te rere i te huarahi, i te wa tuarua i te Groningen Four-Mile Run me te Nairobi Diamond 10K Run, i te whakatakoto i te pai o te 31:45 meneti i te whakamutunga. I tiimata ia ki te whakangungu me te karapu hakinakina o Turkey Üsküdar Belediyesi ka wikitoria i te karapu i roto i nga waahanga takitahi me te roopu i te European Champion Clubs Cup Cross Country. Whai muri i tana wikitoria i te Discovery Kenya Cross Country, i tohua ano a Cheptai mo te kapa Kenya mo te
2015 IAAF World Cross Country Championships ka eke ki te taumata hou i te tuawhitu, ka wini i nga mētara hiriwa a te roopu me Kenya. I runga i te 2015 IAAF Diamond League circuit, i whakanohoia ia ki roto i te ono o nga 5000 m i te Shanghai Golden Grand Prix, Prefontaine Classic me Bislett Games. Ko te mutunga o te whakataetae ki a Viola Kibiwott i te 2015 Athletics Kenya World Championship Trials i whiwhi i a ia i tana waahi tuatahi mo tana kapa tuuturu mo Kenya.