4. Dariusz Michalczewski
Record: 48-2-0 (38 KOs)
Former WBA, WBO, & IBF light heavyweight champion and WBO cruiserweight champion
Estimated Career Earnings: €30 million
The Polish-German boxer went 12 years before receiving his first defeat in the ring. Outside of the squared circle though, he was taking major hits as two divorces cost the boxer over €15 million. He says the rest of the money was spent on cars, homes and even a racehorse.
