Query: There are 26 world title wins and 0 loss record under Floyd Mayweather Jr.

Relevant passages:
Lineal championship <=SEP=> In combat sports where champions are decided by a challenge , the lineal championship of a weight class is a world championship title held initially by an undisputed champion and subsequently by a fighter who defeats the reigning champion in a match at that weight class . In professional boxing , the lineal champion is informally called `` the man who beat the man '' . Champions recognized by sanctioning bodies such as the World Boxing Association ( WBA ) or World Boxing Council ( WBC ) , or the Ultimate Fighting Championship ( UFC ) may vacate their title voluntarily , or be stripped of the title for breaching the sanctioning body 's regulations or contracts . There will thus be a breach of continuity in the list of sanctioned champions which the lineal championship is intended to prevent . However , there is no single canonical list of lineal champions at any weight class , because there is no agreed upon method of determining the starting point for each lineage and conflicting opinions on what to do when the current champion retires or moves to a different weight class , although there is agreement that any stripping of a title be discounted .

Floyd Mayweather Jr. <=SEP=> Floyd Joy Mayweather Jr. ( born Floyd Joy Sinclair ; February 24 , 1977 ) is an American former professional boxer who competed from 1996 to 2015 , and currently works as a boxing promoter . Widely considered to be one of the greatest boxers of all time , undefeated as a professional , and a five-division world champion , Mayweather won fifteen world titles and the lineal championship in four different weight classes ( twice at welterweight ) . As an amateur , he won a bronze medal in the featherweight division at the 1996 Olympics . Mayweather is a two-time winner of The Ring magazine 's Fighter of the Year award ( 1998 and 2007 ) , a three-time winner of the Boxing Writers Association of America ( BWAA ) Fighter of the Year award ( 2007 , 2013 , and 2015 ) , and a six-time winner of the Best Fighter ESPY Award ( 2007 -- 2010 , 2012 -- 2014 ) .   In 2016 , Mayweather was ranked by ESPN as the greatest boxer , pound for pound , of the last 25 years . In the same year , he peaked as BoxRec 's number one fighter of all time , pound for pound , as well as the greatest welterweight of all time . Many sporting news and boxing websites ranked Mayweather as the best boxer in the world , pound for pound , twice in a span of ten years ; including The Ring , Sports Illustrated , ESPN , BoxRec , Fox Sports , and Yahoo! Sports . He is also regarded as the best defensive boxer in the sport , as well as being the most accurate puncher since the existence of CompuBox , having the highest plus -- minus ratio in recorded boxing history . He finished his career with a record of 26 wins without a loss or draw in world title fights ( 10 by KO ) ; 23 wins ( 9 KOs ) in lineal title fights ; 24 wins ( 7 KOs ) against former or current world titlists ; 12 wins ( 3 KOs ) against former or current lineal champions ; and 2 wins ( 1 KO ) against International Boxing Hall of Fame inductees .   In addition to his accomplishments in the ring , Mayweather is well known for being one of the most lucrative pay-per-view ( PPV ) attractions of all time , in any sport . He topped the Forbes and Sports Illustrated lists of the 50 highest-paid athletes of 2012 and 2013 respectively , and the Forbes list again in both 2014 and 2015 , listing him as the highest paid athlete in the world . In 2007 , he founded Mayweather Promotions , his own boxing promotional firm after defecting from Bob Arum 's Top Rank . Mayweather has generated approximately 19.5 million in PPV buys and $ 1.3 billion in revenue throughout his career , surpassing the likes of former top PPV attractions including Mike Tyson , Evander Holyfield , Lennox Lewis , Oscar De La Hoya , and Manny Pacquiao .