Dee ihe na-aga n'ihu maka paragraf a - Na Febụwarị 2015, Derrick meriri nke atọ ya na US Senior Men 12,000 mita USA Cross Country Championship na 36:18, na Boulder, Colorado, iji ruo eru maka 2015 IAAF World Cross Country Championship
na Guiyang, China, ebe ọ nọrọ na 24.