8. Tony Ayala Jr.
Considered one of boxing’s most wasted talents, Tony Ayala Jr. was a professional record who once racked up an unbeaten record of 22 straight wins, including 18 knockouts. The Cuban-American missed out on a title shot because of his problems outside of the ring.
He was convicted of the brutal rape of his neighbour, a school teacher in 1983. He was slammed with a 35-year sentence after previously being convicted of alcohol-related offences in the past. He’d be released in 1999 but sent down again in 2004 for offences including heroin possession. In 2015, he died from a drug overdose.