Sadly it's easier to name those who HAVEN'T gone broke.

Vinny Pazienza, known as Vinny Paz, former World Champion, started his career as a Lightweight and ended as a Super Middleweight. His career inside the ring seemed to be a never ending series of "ups" and "downs." Unfortunately for the Rhode Island native, financial life outside the ring was mostly "downs."

Vinny developed a gambling habit. A very large gambling habit. The kind of gambling habit that leaves a man with six-figure markers in casinos. Like any addicted gambler, Vinny apparently believed that he was only one good run—one lucky streak—away from getting even. Inevitably, this led to a criminal charge of passing bad checks in a Vegas casino when the credit lines ran dry.

Some people might cut their losses at this point and hope to work down the debt over time. Not Vinny Paz, though. Paz gathered up all the money he had left and decided to gamble in a different way—he became a stock market investor. Supposedly, he blew $1 million in the market before calling it quits.

Despite $6 million in career earnings, Paz was in debt to the tune of $2 million at this point. Bankruptcy was the only option.