Floyd Mayweather is one of the world’s richest professional athletes and has built an estimated net worth of roughly $450 million throughout his incredibly successful boxing career. The undefeated, 40-year-old pugilist has been at the peak of his sport for roughly two decades, earning more than any other fighter in history and racking up 49 consecutive victories. With that kind of performance and the incredible revenues that his fights have brought in, it’s not hard to see why he has the nickname “Money.” And Mayweather’s net worth is still growing.