 Nyorai kuenderera mberi kwechikamu chino - Muna 2015, Okon George akaisa PB itsva ye50.76s mumamita mazana mana pamusangano weResisprint muguta reSwitzerland reLa Chaux-de-Fonds. Iyi yakanga iri nguva yake yokutanga pasi pechikumbaridzo che51s. Pa2015 World Championships in Athletics, akaenzana nePB yake mumasemi-fainari evakadzi 400 m mushure mekutumira nguva ye50.87 s kuti akwanise wechitatu nekukurumidza mumvura yake. Gare gare mugore racho paMitambo yeAfrica Yose, akahwina menduru yesirivheri kuseri kwaKabange Mupopo muhunhu hutsva hwe50.71 s. 