Mike Tyson was disqualified for biting Evander Holyfield's ear during their heavyweight title fight, leading to one of the most controversial moments in boxing history.

Anthony Pettis was stripped of his UFC lightweight title in 2015 after a controversial split decision loss to Rafael dos Anjos, which many believed should have been a draw.

The "Fight of the Century" was the highly anticipated boxing match between Manny Pacquiao and Floyd Mayweather Jr. in 2015, which generated record-breaking revenue and viewership.

The Steroid Era was a period in the 1990s when professional wrestling was plagued by allegations of widespread steroid abuse among its performers, leading to health concerns and controversy.

Conor McGregor was involved in a controversial incident during a weigh-in for a UFC fight, where he allegedly threw a water bottle at his opponent, Nate Diaz, leading to a heated confrontation.

The Battle of the Ages was a boxing match between Sugar Ray Robinson and Jake LaMotta in 1951, which ended in a controversial draw despite many believing that Robinson had clearly won.

Jon Jones was involved in a controversial incident during a UFC fight where he was accused of using an illegal technique known as "eye pokes", leading to a disqualification and suspension.

The Long Count was a boxing match between Jack Dempsey and Gene Tunney in 1927, which was stopped due to a controversial referee decision to allow Dempsey extra time to recover from a knockdown, despite Tunney being able to continue.

Anderson Silva was involved in a controversial incident during a UFC fight where he was accused of biting his opponent, Chael Sonnen, leading to a disqualification and suspension.

The No Mas Fight was a boxing match between Roberto Duran and Sugar Ray Leonard in 1980, which was stopped due to Duran's refusal to continue, famously uttering the words "No mas" (No more).

Brock Lesnar was involved in a controversial incident where he was accused of using performance-enhancing drugs, leading to a suspension from the UFC.

The Phantom Punch was a boxing match between Jack Dempsey and Gene Tunney in 1927, which was controversial due to a punch thrown by Dempsey that many believed never landed, leading to a disputed decision.

Jon Jones was involved in a controversial incident where he was accused of assaulting a fellow UFC fighter, Daniel Cormier, outside of the ring, leading to a suspension and legal consequences.

The Disqualification was a boxing match between Jack Dempsey and Gene Tunney in 1927, which was stopped due to Dempsey being disqualified for hitting Tunney below the belt.