Floyd Mayweather Jr. is considered one of the greatest boxers of all time. He has a professional record of 50 wins and 0 losses, making him the only boxer in history to retire undefeated with at least 50 wins. However, his record is not without controversy.

Mayweather's early career was marked by impressive wins and a few close calls. He won his first world title in 1998 at the age of 21, and by 2001 he had three more titles in different weight classes. In 2002, he faced Jose Luis Castillo in a highly controversial fight that many felt Mayweather lost. Despite this, he was awarded a unanimous decision victory.

Another close call came in 2007 when Mayweather faced Oscar De La Hoya, one of the biggest fights in boxing history. Mayweather won by split decision, with some fans and experts arguing that De La Hoya should have been given the victory.

In 2013, Mayweather faced another controversial decision in his fight against Canelo Alvarez. Many felt that Mayweather dominated the fight and should have won by a wider margin, but the judges gave him a majority decision victory.

While Mayweather's undefeated record is impressive, some critics argue that he carefully selected his opponents and avoided fighting the best fighters in their prime. For example, he waited until Manny Pacquiao was past his prime before agreeing to fight him in 2015. Mayweather won the fight by unanimous decision, but it was widely considered a disappointment due to the lack of action.

In addition, Mayweather has faced legal troubles outside of the ring, including domestic violence allegations and a prison sentence in 2012.

Overall, Mayweather's record is impressive, but it is not without controversy. While he has defeated many impressive opponents, some feel that he carefully selected his opponents and avoided the toughest challenges.