 Rambai muchinyora ndima iyi - Cowley akatanga kukwikwidza pamakwikwi epasi rose emutambo wenhabvu muna 2008 World Race Walking Cup kwaakakwikwidza mumakwikwi evana vadiki emakiromita gumi; achipedza 39th munguva yemaminitsi makumi mana nemasere nemasekondi makumi maviri nemana. Akabva apinda mumakwikwi e2010 World Junior Championships muAthletics uko akapedza ari wechi17 mumakwikwi emakiromita gumi. Cowley akakwikwidza mune mamwe maWorld Race Walking Cup maviri muna 2010 na2012. Mumakwikwi a2010 akakwikwidza zvakare mumakwikwi evana vadiki emakiromita gumi. Nguva ino akapedza ari wechi15. Mugore ra2012 reIAAF World Race Walking Cupakakwikwidza mumakwikwi evakuru ekufamba makiromita 20 uye akapedza ari wechi90. Akakwikwidza mumakwikwi ake ekutanga eWorld Championships mumakwikwi e2013 kwaakapedza 50th kubva kune vatambi ve64 mumakwikwi e20km. 2014 World Race Walking Cup yaive yechina World Race Walking Cup yaCowley. Akapedza ari wechi57 mukumhanya kwemakiromita 20 kwevakuru. Cowley akakwikwidza mu2015 Summer Universiade, yake yekutanga Summer Universiade. Mugumo wake wechi13 mumakiromita 20 ekufamba ndiwo mugumo wake wakanakisisa pamakwikwi enyika dzakawanda. Cowley akanakisa kupedzisa muWorld Race Walking Cup yakauya mu2016 edition paakapedza 39th muvakuru 20kilometer kufamba. Cowley akakwanisa kuenda kumitambo yeOlympic yokutanga muna 2016. Mumitambo yeOlympics ya2016 achakwikwidza mumakwikwi ekufamba kwemakiromita makumi maviri. 