At WWE WrestleMania XXIV on March 30, 2008, Floyd Mayweather Jr. defeated The Big Show by "knockout" after several chair shots, and punching Big Show with brass knuckles.

Mayweather made an appearance at WWE's No Way Out pay-per-view the previous month, during which he had a confrontation with Big Show and broke Show's nose after a combination of punches. This led to their WrestleMania feud.

• Topix.net: Floyd Mayweather WWE
• Google News: Floyd Mayweather WWE
• WWE.com: Show-n up (March 30, 2008)
  • Floyd Mayweather showed the world at WrestleMania why he is a six-time champion in five different boxing weight classes.
• SI.com: So 'Money' (March 30, 2008)
  • The absurdity of the match, however, was probably best captured early on when Mayweather dangled on Wight's back and brought him down with a chokehold before Wight recovered and took out most of Mayweather's entourage.
• The Sweet Science: Money Mania! Mayweather Gets WWE KO Win (March 30, 2008)
  • Floyd "Money" Mayweather is still undefeated, in the realm of pugilism, and pro wrestling, as he dropped "The Big Show" with some makeshift brass knuckles and scored a KO win a Wrestlemania 24 at the Citrus Bowl in Orlando, Florida on Sunday night.
• The Grand Rapids Press: Mayweather knocks out Big Show at WrestleMania (March 30, 2008)
  • [Mayweather] wrapped the brass knuckles around his right hand and landed one punch, prompting a 10-count victory before before a crowd of 74,635, which produced a WWE-record live gate of $5.85 million.
• Orlando Sentinel blog: Mayweather Beats Big Show at Wrestlemania (March 30, 2008)
• SI.com: Mayweather goes from WBC to WWE (February 25, 2008)
• WWE.com: Showtime in Vegas (February 17, 2008)
• TransWorldNews: Floyd Mayweather to Compete at WrestleMania 24 (February 18, 2008)
• National Ledger: Floyd Mayweather Joins WWE for Wrestlemania (February 18, 2008)