15. Mike Tyson
Mike Tyson earned over $400 million during his boxing career, including $75 million in a single year, which makes his 2003 bankruptcy filing, $23 million in debt, one of the most dramatic financial collapses in sports history. He's blamed the people around him during that period, and has since rebuilt through brand deals, cameos, and a high-profile return to the ring against Jake Paul. But his current net worth of around $30 million, while nothing to dismiss, is a long way from where $400 million could have taken him. | © PowerfulJRE / YouTube