Floyd Mayweather Jr. competed in professional boxing from 1996 to 2015.
=== Modern history ======= 1900 to 1920 ====In the early twentieth century, most professional bouts took place in the United States and Britain, and champions were recognised by popular consensus as expressed in the newspapers of the day
 In 2006, he founded his own boxing promotional firm, Mayweather Promotions, after leaving Bob Arum's Top Rank

