Hate to point out the obvious/facts in a post like this, but Norton had already lost to Jose Luis Garcia and Ali prior to losing to Foreman in 73. Would be surprised if Ernie Shavers, Gerry Cooney, Mike Tyson, Riddick Bowe, Lennox Lewis, Herbie Hide, Tommy Morrison, Razor Ruddock, or any other heavyweight with one punch power lost to any version of Ken Norton.