Floyd Mayweather Jr. retired with a 50–0 professional record in 2017. He reached that mark on August 26, 2017, when he stopped UFC champion Conor McGregor by technical knockout in the 10th round in Las Vegas.
Mayweather had originally retired after defeating Andre Berto in September 2015, ending that phase of his career at 49–0 and matching Rocky Marciano’s famous unbeaten heavyweight record. His return against McGregor supplied the 50th victory and gave him the perfect record commonly associated with his final professional career total.
Mayweather’s career included world championships in five weight divisions and victories over elite opponents such as Oscar De La Hoya, Manny Pacquiao, Miguel Cotto and Canelo Álvarez. His defensive skill, counterpunching and ability to control distance were central to his success.
The date can cause confusion because 2015 was his earlier retirement, while 2017 was the retirement associated with the 50–0 record. Exhibition bouts after 2017 do not change the official 50–0 professional record.