Awal bulan ini, Mamby, yang meraih gelar kelas welter ringan WBC pertama 28 tahun lalu, disebut-sebut sebagai petinju tertua yang mendapat ijin bertanding ketika ia kalah angka dalam pertandingan 10 ronde di Cayman Islands.
Earlier this month, Mamby, who was first crowned WBC light welterweight champion 28 years ago, became what is believed to be the oldest boxer ever in a sanctioned bout when he lost a 10-round decision in the Cayman Islands.