No one at the time had the style to beat Roy Jones Jr.

Montel Griffin came the closest, and even he got knocked out twice, except they called one of them a DQ.

Nunn was a very good technical boxer, but that wouldn't work against Roy, because Roy was so unorthodox, lightning fast and as JonesJrMayweather said, Roy was very powerful.

Toney KO'd Nunn, and I expect Roy would have as well.