king Floyd "Money" Mayweather has announced his retirement.

So, Floyd Mayweather has announced his retirement, again, and this time he says he will stick to his decision. We will see. Skepticism is understandable. Mayweather had announced his retirement before, but this time he has issued an official statement. He is 31, undefeated and has made tens of millions.

Maybe Mayweather will be one of the few to walk away and stay away. He doesn't need the money and he has accomplished much. Will he, though, miss the thrill of competition? Being center stage in a major fight is one of sport's biggest highs. Mayweather has a lot of expensive toys and there are many things he can do with his life, but boxing's one-on-one test of will and skill is something that has a magnetic pull to those who have excelled at the top level. As Lennox Lewis said when announcing his retirement in 2004: "For such a long time I was thinking, shall I go in there and have one last fight? But this is the drug of the sport. There's always somebody to fight."

If Mayweather can do as Lewis has done and resist the drug that is boxing he will be part of a select group.