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: