Watch the Mayweather knockdown of Marquez video in the second round of their boxing match at the MGM Grand below. Mayweather knocked down Marquez with a solid left hook right on the chin of the Mexican. Mayweather defeated Marquez via unanimous decision that was never close.

The judges decided on the Mayweather win, with the final scorecard of 118-109, 120-107, 119-108. It is clear that the former pound-for-pound (P4P) king is back and is looking to regain his throne.

“Sugar” Shane Mosley offered a challenge to Floyd Mayweather, Jr. at the post fight interview. The two got into a scuffle before being separated by Golden Boy staff.

Watch the video of how Mayweather knocked down Marquez:

Floyd Mayweather, Jr. defeated Juan Manuel Marquez and announced to the world that “He’s Back!” in their boxing match at the MGM Grand. Mayweather completely dominated the Mexican Marquez for all 12 rounds of the fight. Mayweather knocked down Marquez in the second round with a left hook to the chin and won almost every round in the eyes of the boxing judges.

The dominant Mayweather win over Marquez signified his return to the boxing scene and possibly to the top of the pound-for-pound (P4P) rankings. Michael Buffer announced the Floyd Mayweather win with “He’s back!” after all three judges awarded him a unanimous decision victory. All three judges awarded the fight to Floyd Mayweather, Jr., with the following scores: 118-109, 120-107, 119-108.

Mayweather delivered a solid left hook to the chin of Marquez that sent the Mexican down on the canvas at the 1:25 mark of the second round. It was merely a sign of things to come for Juan Manuel, who was thoroughly outclassed by “Money” for the next 10 rounds. Marquez was visibly slower, weaker, and older than his opponent, Mayweather, who got into a scuffle with “Sugar” Shane Mosley and the ring interviewer after the fight.

The punches landed percentage was a clear indicator of the Mayweather-Marquez results. Floyd connected on 290/493 for a 59% connect percentage, while Marquez was a lowly 69-583 for 12%.

With the Floyd Mayweather win over Juan Manuel Marquez, Mayweather improved his win-loss record to 40-0 while Marquez dropped to 50-5-1.

Watch the live stream video of Floyd Mayweather, Jr. and his fight with Juan Manuel Marquez in his first boxing match since retiring more than a year ago. Mayweather will seek to reclaim his #1 pound-for-pound throne against the tough Mexican lightweight champion.

In the Mayweather-Marquez free live stream video, Marquez will seek redemption for his winless fights against Filipino boxing icon Manny Pacquiao. He has since been on a winning streak, with the last win coming from a stunning come from behind knockout of Juan Diaz. Marquez has also admitted to drinking his own urine as part of his training regimen.

Floyd Mayweather, Jr. came into the weigh-in two pounds above the catchweight limit. The Mayweather-Marquez showed Floyd overweight. He thus will owe Marquez $300,000 per pound above the limit, thus totaling $600,000.

The Mayweather-Marquez HBO videos has shown the lives of both fighters, including their training regimen.

You can watch the Mayweather-Marquez live stream video here at JustinTV.