Floyd Mayweather's career record is among the best in boxing history with 26 of his wins coming via the knockout.
His current record of 49-0 ties him with the legendary Rocky Marciano, who achieved the same record as a heavyweight in the 1950s.
See the 12 Best Mayweather Knockouts, compiled by Men's Fitness.
Mayweather turned professional on October 11, 1996. In his first professional fight nearly 21 years ago, he defeated Roberto Apodaca by TKO. Following a win by unanimous decision over Reggie Sanders less than two months later, he would go on to register 12 knockouts in his next 13 fights.
As a pro, Mayweather continued to win at an astonishing rate. With his father serving as both manager and trainer after his release from prison, the talented boxer won several easy bouts. In 1998, he defeated Genaro Hernandez to capture his first world title, the WBC super featherweight championship.
Know more about the life story of Floyd Mayweather at Biography.com.