Shane Mosley vs. Floyd Mayweather Jr.
2010-05-01 : Floyd Mayweather Jr 146 lbs beat Shane Mosley 147 lbs by UD in round 12 of 12
- Location: MGM Grand, Las Vegas, Nevada, USA
- Referee: Kenny Bayless
- Judge: Dave Moretti 119-109
- Judge: Robert Hoyle 118-110
- Judge: Adalaide Byrd 119-109
- World Boxing Association Super World Welterweight Title
- Shane Mosley 46-5 (39 KOs) vs. Floyd Mayweather Jr. 40-0 (25 KOs)
- Mayweather Jr. entered ranked at # 2 pound-for-pound and the # 3 welterweight in the world according to The Ring Magazine. Strangely, Mosley, a 3-1 underdog entered as the # 3 pound-for-pound fighter in the world, but the # 2 welterweight.
- In buildup for the fight, HBO aired its series "24/7" in which it briefly chronicled the two fighters' training and preparations for the bout.
- Ticket prices for the bout ranged from $100-$1250.
- Mayweather earned a guaranteed $22.5 million purse, while Mosley was guaranteed $7 million. Mayweather's actual earnings, however, likely exceeded $40 million after the HBO pay-per-view totals were calculated. 
- Notables in attendance included Muhammad Ali, Mike Tyson, Oscar De La Hoya, Will Smith, Arnold Schwarzenegger, Earvin "Magic" Johnson, Michael J. Fox, Sean "Puff Daddy" Combs, Jamie Foxx, Mark Wahlberg, Leonardo DiCaprio, Mariah Carey and Paris and Nicky Hilton. Hip-hop artist Chris Brown sang the national anthem.
The opening round saw both fighters come out tentatively each looking to counter the other. Apart from a few decent jabs, neither fighter landing to effect. Mosley went down midway through the round from a slip. A pair of big right hands hurt Mayweather in the 2nd and it appeared at one point that he may go down. He was able to maintain himself, however, until the end of the round. Mayweather appeared to have regained his composure and likely won the 3rd Round by stepping up his aggression and pressing Mosley.