Mezue ahịrịokwu na-esonụ: Oge 2014 bụ nzọụkwụ azụ na egwu maka Cheptai, ebe ọ kwụsịrị dị ala na agbụrụ Diamond League ma ghara imeziwanye ihe kachasị mma ya. O mere ọganihu n'ịgba ọsọ n'okporo ụzọ, agbanyeghị, na-abata nke abụọ na Groningen Four-Mile Run na Nairobi Diamond 10K Run, na-etinye oge kachasị mma nke 31:45 nkeji na nke ikpeazụ. Ọ malitere ọzụzụ na klọb egwuregwu Turkey Üsküdar Belediyesi wee weta mmeri klọb na ụdị mmadụ na otu na European Champion Clubs Cup Cross Country. Mgbe o meriri n'asọmpi Discovery Kenya Cross Country, a họpụtakwara Cheptai ọzọ n'otu ndị Kenya maka asọmpi ahụ.
2015 IAAF World Cross Country Championships ma rute ọkwa ọhụrụ dị elu n'ọnọdụ nke asaa, na-emeri ndị otu ọlaọcha ọla ọcha na Kenya. Na 2015 IAAF Diamond League circuit, o tinyere n'ime isii kachasị elu nke 5000 m na Shanghai Golden Grand Prix, Prefontaine Classic na Bislett Games. Onye na-agba ọsọ na-agba ọsọ na Viola Kibiwott na 2015 Athletics Kenya World Championship Trials nwetara ya ebe na mbụ ya okenye track otu maka Kenya.