Mike Tyson, George Foreman and David Tua are regarded as three of the hardest punching heavyweights to have ever laced 'em up.
Looking for his third consecutive win on his comeback, 51 year old 1990s heavyweight contender Razor Ruddock (40-5-1, 30 KO) will fight on a relatively high profile card next month.
One of the last opportunities for a fighter to gain that all-important psychological advantage is the stare down.
Mike Tyson once stated most of his opponents got intimidated before the fight and, as a result, were losers before they absorbed the first punch.
Most boxers start to lose a step in their late thirties, but this list isn't about most boxers. This list is about those special boxers who found the Fountain of Youth.