Floyd's lineage at junior lightweight comes from beating Genaro Hernandez, who beat Nelson. However, most (including Cyber Boxing Zone) recognized Nelson as linear champ after beating Leija, even though it was only for a defense of the WBC belt Nelson already held. So how did he all of a sudden earn the crown when he wasn't undisputed or the man who beat the man?
Well without looking to much into it..My guess is that because Mitchell retired the linear title was just bestowed on Nelson..probably because he ko'd Fenech. Sometimes that just seems to happen.