Floyd Joy Mayweather, Jr. (born Floyd Joy Sinclair on February 24, 1977), is a former American professional boxer who has a record of 39-0 (25 KOs). He is the son of Floyd Mayweather Sr., a former welterweight boxing contender.
From July 18, 2005 through June 2, 2008 he was rated by The Ring magazine as the number-one pound for pound boxer in the world. Mayweather has won six world boxing championships in five different weight classes; he is the former WBC welterweight champion, a title he vacated upon his retirement. He was named Ring Magazine Fighter of the Year in 1998 and 2007. ESPN.com listed Mayweather at #48 on their "50 Greatest Boxers of All Time" list.
Mayweather was also well known for competing on the fifth season of Dancing with the Stars where he was the fourth celebrity eliminated from the competition.