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The Undefeated Legacy: 5 Shocking Facts About Who Really Won Mayweather Vs. Conor McGregor

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The question of "who won Mayweather or Conor" remains one of the most searched queries in combat sports history, even years after the final bell. The highly anticipated crossover bout, famously dubbed "The Money Fight," pitted the undefeated boxing legend Floyd "Money" Mayweather Jr. against the reigning UFC superstar Conor "The Notorious" McGregor in a spectacle that transcended both boxing and mixed martial arts (MMA).

For those seeking the definitive, official result as of December 20, 2025, the answer is clear: Floyd Mayweather Jr. secured the victory via technical knockout (TKO) in the 10th round. The fight, which took place on August 26, 2017, in Las Vegas, Nevada, was a masterclass in strategic attrition by the veteran boxer, who improved his professional record to an unprecedented 50-0.

Floyd Mayweather Jr. vs. Conor McGregor: The Official Result and Biographical Snapshot

The monumental clash between the two biggest names in their respective sports was a one-off boxing match held at the T-Mobile Arena in Paradise, Nevada.

Floyd "Money" Mayweather Jr. (The Boxer)

  • Nickname: Money, Pretty Boy
  • Nationality: American
  • Professional Boxing Record (at the time): 49-0 (before the McGregor fight)
  • Final Professional Record: 50-0
  • Date of Birth: February 24, 1977
  • Weight Class for the Fight: Light Middleweight (154 lbs)
  • Significance of the Win: Surpassed Rocky Marciano's long-standing 49-0 record.

Conor "The Notorious" McGregor (The MMA Fighter)

  • Nickname: The Notorious
  • Nationality: Irish
  • Professional MMA Record (at the time): 21-3
  • Professional Boxing Record: 0-1 (after the Mayweather fight)
  • Date of Birth: July 14, 1988
  • Weight Class for the Fight: Light Middleweight (154 lbs)
  • Significance of the Bout: His professional boxing debut against one of the greatest boxers of all time.

The fight officially ended when referee Robert Byrd stepped in to stop the contest at 1:05 of the 10th round, awarding Mayweather the TKO win.

The True Story Behind the 10th-Round TKO: Scorecards and Strategy

While the result is a clear win for Mayweather, the narrative of the fight is far more nuanced, giving rise to the curiosity that still drives people to search for the outcome. McGregor's performance, particularly in the opening rounds, surprised many boxing analysts and fans.

McGregor's Early Success and the "Gas Tank" Entity

McGregor, utilizing his unorthodox MMA stance and movement, was surprisingly effective in the first three to four rounds. He landed several clean shots and kept Mayweather on the back foot, leading many to believe the UFC champion had a real chance.

However, the tide began to turn dramatically around the fourth round. Mayweather, known for his defensive prowess and ring IQ, executed a clear strategy: he allowed McGregor to punch himself out. The boxer intentionally walked down the MMA fighter, absorbing the early flurries and forcing McGregor to expend vast amounts of energy.

This strategic shift exploited a major weakness of McGregor's: his "gas tank" or cardio in a 12-round boxing format. As the fight progressed, McGregor’s power and accuracy faded significantly, a key factor in the eventual stoppage.

Official Scorecards at the Time of Stoppage

Crucially, the official judges' scorecards confirm that Mayweather was clearly winning the fight at the time of the TKO in Round 10. The notion that McGregor was "winning" before the stoppage is a myth, as the veteran boxer had taken control of the middle rounds. The scores were as follows:

  • Judge Dave Moretti: 87-83 (Mayweather)
  • Judge Guido Cavalleri: 89-82 (Mayweather)
  • Judge Burt Clements: 89-81 (Mayweather)

These scorecards show that Mayweather had won at least seven, and in some cases, eight of the nine completed rounds before the final round stoppage.

The Money, The Rules, and The Legacy of the Crossover Fight

The bout was less about a boxing title and more about a massive financial spectacle, which is why it was billed as "The Money Fight" and "Boxing vs. MMA: Champion of Champions."

The Unprecedented Financial Entities

The sheer financial scale of the event set new benchmarks for combat sports. It was a massive commercial success that generated over $600 million in total revenue.

  • Pay-Per-View (PPV) Buys: The fight generated 4.3 million domestic PPV buys, making it the second-highest-selling pay-per-view event in combat sports history, narrowly behind Mayweather's 2015 fight against Manny Pacquiao (4.6 million).
  • The WBC Money Belt: A special, one-off "WBC Money Belt" was created for the winner. This commemorative title was a rare and opulent creation commissioned by the World Boxing Council (WBC), representing the epitome of extravagance for the event.

Controversial Ruleset: 8-Ounce Gloves

The fight was a straight boxing match, meaning McGregor was contractually and legally prohibited from using any MMA techniques, such as kicks, elbows, or takedowns. The Nevada State Athletic Commission (NSAC) made a significant, controversial rule change for the event, allowing both fighters to wear 8-ounce gloves instead of the standard 10-ounce gloves required for a fight contested at the 154-pound light middleweight limit.

This change was seen by some as favoring McGregor's power, but ultimately did not change the outcome. The professional boxing ruleset was the biggest hurdle for the MMA star.

The Post-Fight Careers and The Rematch Rumors of 2026

The "Money Fight" was supposed to be Mayweather's final bout, sending him into retirement with a perfect 50-0 record. However, neither fighter has truly stepped away from the spotlight, and the question of a rematch remains a hot topic, providing the most current and fresh updates on the legacy of the fight.

Floyd Mayweather's Post-50-0 Activity

Since the McGregor fight, Floyd Mayweather has remained "retired" from professional boxing but has participated in a series of high-profile, lucrative exhibition bouts against various opponents, including Japanese kickboxer Tenshin Nasukawa and Logan Paul. These non-sanctioned fights allow him to maintain his 50-0 professional record while continuing to earn massive paydays.

Conor McGregor's Boxing and MMA Future

The fight marked McGregor's only professional boxing appearance. His MMA career since 2017 has been marked by inconsistency and long layoffs, fighting only a handful of times in the UFC. Despite this, McGregor has consistently teased a return to the boxing ring, sometimes suggesting a rematch with Mayweather or a fight under a hybrid ruleset.

The Latest Rematch Status: Potential 2026 Entity

The rumors of a rematch have persisted for years, often fueled by both fighters. As of late 2025, there are ongoing discussions for a potential second bout. The most recent speculation suggests a potential "Mayweather vs. McGregor II" could be scheduled for as early as 2026, possibly at the Super Welterweight division.

While a second professional boxing match would likely yield the same result, the financial entity of the fight is simply too large to ignore. The initial bout proved that the crossover appeal of "Boxing vs. MMA" can generate a massive global audience, ensuring that the legacy of the first "Money Fight" continues to generate speculation and record-breaking revenue.

who won mayweather or conor
who won mayweather or conor

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