The undefeated boxer formerly known as "Pretty Boy" Floyd Mayweather Jr. is now "Money" Mayweather.  Although he's been known by the newer nickname for quite some time now, he finally explained why he went from "Pretty Boy" to "Money".

"The nickname 'Money' came from when I was joking and throwing money into the camera, so it stuck with me," Mayweather explained during a media day last week. "You can't be a 35-year-old man calling yourself 'Pretty Boy.'"

Upon further research, Mayweather never even originally called himself "Pretty Boy."  He earned the nickname while he was an up-and-comer because he emerged out of every fight without any cuts or bruises.