https://www.quora.com/Boxing-sport-Is... In terms of his accomplishments: 1. He is the longest reigning champion in boxing of 12.5 years surpassing Joe Louis' 11.7 year championship reign with consecutive championship wins. 2. He matches Joe Louis record of 26 consecutive championship wins along with Caecillia Braekhus who also has the same record. 3. The sweet science of boxing is to hit and not get hit and Mayweather mastered that. He has a 46% Connect% and his opponents have a 16% Connect% on him. Which means his +/- ratio (or his Connect% - the average opponent's Connect% on him) is 30% which means he is 30% more likely to land on the opponent than the opponent hit him. This is the highest in all of boxing's history showing how accurate & precise he is at hitting his opponents while they have much more difficulty hitting him. 4. He is the only post prime world champion in boxing history to be regarded as the best fighter in the world until he retired from the sport. 5. He has the record for beating the most former present & future world champions in boxing's history. 22 world champions: 19 WBC/WBA, 2 WBO & 1 IBF. 6. He is the only boxer to win 12 World Championship Titles (Not including minor, interim nor regular if there is a superchampion or franchise champion). No other fighter has won more. 7. He is the only fighter in boxing's history to beat back to back 15 former or current world champions in a row in 16 fights! That's stiff competition at the highest level in his respective divisions. 8. He has faced 12 lineal Champions, 14 current world champions of which 4 of them are INDUCTED into the International Boxing Hall of Fame. 9. Faced 10 Top 10 past future or present P4P Fighters in the world and 6 top 10 current P4P fighters while himself wad a 17x Top 10 P4P fighter and 5x P4P King. 10. He is commonly ranked as a top 2 Super Featherweight & top 10 Welterweight of all time. 11. He was involved in 4 of the biggest events in the history of boxing: DeLaHoya vs Mayweather, Alvarez vs Mayweather, Pacquiao vs Mayweather and McGregor vs Mayweather. 12. He is currently the highest grossing athlete in the history of sports. 13. He is one of the pioneers of independent anti-doping drug testing, regulations for proper gloves to be worn in fights and earlier stoppages of fights to protect the fighter's lives. 14. He has lain the blueprint for fighters to be able to have more control over their careers and the business of their careers through self promotion without staying with larger promotional companies. 15. He is a successful promoter, fighter and now he strives to be a successful trainer with a hands on approach to giving back to boxing. He calls himself TBE (The Best Ever). These are the #FACTs about Floyd Mayweather and his career. If there is anything which is factually wrong mention in the comments section below. 16. His career boxing record is 50-0-0 (0) in terms of professional fights author - Anson Phillip