Whakaotihia te rerenga e whai ake nei: I te Hui-tanguru 2015, i wikitoria a Derrick i tana tuatoru o nga US Senior Men 12,000 mita USA Cross Country Championships i te 36:18, i Boulder, Colorado, hei tohu mo te
2015 IAAF World Cross Country Championships i Guiyang, Haina, i reira i noho ai ia ki te 24th.