Floyd Mayweather, Jr.

He may not be a fan-favorite, but Floyd Mayweather, Jr. is a big shot in the world of boxing. The 42-year-old star now left the world of boxing but has earned multiple world titles in five weight classes during his career. He also had the lineal championship in four weight classes and managed to retire with an undefeated record. He was even ranked as the greatest boxer, pound for pound, of the last 25 years by ESPN in 2016, remained to be BoxRec’s number one fighter of all time, and the greatest welterweight of his era.

However, Mayweather, Jr. already retired from the sport itself and chose to focus on his promotional company instead. That is not entirely a bad decision since the moment he started focusing on one thing, his net worth grew even more. With a net worth of $1 billion, he probably won’t have to worry about bankruptcy in the future.