Like it or not, Floyd Mayweather is a genius -- and played the "game of boxing" better than anyone else in the history of the sport ... changing it forever, so says Max Kellerman.
There will always be an argument about who's the best pure boxer of all time -- Floyd? Muhammad Ali? Joe Louis? -- but when it comes to the business side of the sport, Max tells us there's only one name in the conversation.
"He retired undefeated. He made hundreds of millions of dollars.