
Floyd Mayweather Jr. (born 1977) retired undefeated at 50–0 and is widely considered the greatest defensive boxer of his generation. He won world titles in five weight classes.
Mayweather's shoulder roll defense, precise counterpunching, and ring IQ made him virtually unhittable. His fights with Oscar De La Hoya, Canelo Alvarez, and Manny Pacquiao broke pay-per-view records.
Reference:
TaskLoco™ — The Sticky Note GOAT