#2. Conor McGregor
At one point in time, Conor McGregor was at the top of the MMA world. Helming the UFC's most lucrative pay-per-view events, the Irishman could do no wrong.
Fortune, fame, and success were at his fingertips. McGregor was the promotion's first simultaneous two-division champion and even managed to convince Dana White to co-promote a boxing match with Floyd Mayweather Jr.
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However, 'The Notorious' is just as well known for his frequent clashes with the law. A litany of driving offenses, ranging from speeding to reckless driving with no license or documents, are the lightest of McGregor's offenses.
The infamous bus attack targeting divisional rival Khabib Nurmagomedov before UFC 223 was perhaps the Irishman's most widely known offense. Not only was McGregor arrested, but he was sued by fellow fighter Michael Chiesa.
What followed was a downward spiral that led to various sexual assault allegations, a video-captured assault against an older man at a pub, and several other incidents. These have triggered the frustrations of even the most ardent McGregor fans.
#1. Jon Jones
Many fans consider Jon Jones to be the greatest mixed martial artist in history. With the exception of a disqualification loss to Matt Hamill in a fight he was thoroughly dominating, Jones is yet to taste defeat in 28 fights.
Unfortunately, Jones' brushes with the law and countless controversies have overshadowed his accomplishments inside the octagon.
Other than his multiple drug test failures and the infamous brawl with rival Daniel Cormier at a UFC 178 media event, Jones has had frequent clashes with the law. In 2015, Jones was responsible for a hit-and-run incident involving a pregnant woman.
Following the collision, Jones fled the scene, returning not to assess the victim's condition, but to retrieve money.
Drugs were found in Jones' car, and upon his arrest, he was stripped of the light heavyweight title before facing indefinite suspension. Furthermore, in 2019, Jones was charged with assaulting a cocktail waitress at a strip club.
A year later, Jones was again arrested for driving while intoxicated, negligent use of firearms, and driving without proof of insurance. It would not be the end of Jones' struggles with the law.
Late last year, Jones made headline news for assaulting his then fiancé, Jessie Moses. After his youngest daughter urged her mother to call law enforcement, Jones was arrested while attempting to flee from the hotel where the incident took place.
Jones was charged with domestic battery and was ultimately banned from his long-time gym Jackson Wink MMA before Moses finally broke off her relationship with the former light heavyweight champion.