 Defiagbon akaberekerwa muSapele, Nigeria, akahwina goridhe mu welterweight 67 kg mu1990 Commonwealth Games. Somunhu ane huremu hwepakati nepakati, akahwina menduru yebronze mu 1991 All-Africa GamesMuCairo. Muna 1992 muBarcelona kumaOlympics ezhizha akamiririra Nigeria uye akabviswa mumutambo wekutanga wechikamu chepakati chepakati 7 kusvika ku8 vachipesana naRaúl Márquez. 