Pari gbolohun ti o tẹle: Ni Kínní 2015, Derrick ṣẹgun rẹ kẹta lẹsẹsẹ US Senior Men 12,000 mita USA Cross Country Championships ni 36:18, ni Boulder, Colorado, lati yẹ fun awọn
2015 IAAF World Cross Country Championships ní Guiyang, China, níbi tí ó ti gba ipò kẹrìnlélógún.