 Nyorai kuenderera mberi kweiyi ndima - Mugore rinotevera Miller-Uibo akakunda 2011 World Youth Championships muAthleticsaine nguva ye51.84, achiva mutambi wekutanga akambobata zvose U20 uye U18 makwikwi emamita mazana mana panguva imwe chete. Akadzoka kuzodzivirira zita rake remamita mazana mana pamitambo yeCarifta ya2011, asi akarambwa mumutambo wekupedzisira. Akakundikanawo mukudzivirira kwake pa2012 World Junior Championships muAthletics, achidzokera pachinzvimbo chechina. Zvisinei akahwina 200 m uye 4 × 400 metres relay sirivha menduru pa2012 CARIFTA Mitambo. Mumakwikwi ake ekupedzisira ezera, akahwina menduru nhatu dzegoridhe 200 m, 400 m, 4 × 100 metres relay pa2013 CARIFTA Mitambo uye akapihwa mubairo weAustin Sealy semutambi akanakisa wemutambo. 