Mayweather vs Ortiz: Live Results and Round-By-Round Coverage for the Main Event

After the off-TV undercard and the pay-per-view undercard, join us right here in the comments of this thread for the main event tonight between pound-for-pound great Floyd Mayweather Jr and his opponent, the defending WBC welterweight titleholder, "Vicious" Victor Ortiz.

Mayweather (41-0, 25 KO) is making his return to the ring after 16 months off following a lopsided decision win in May 2010 against "Sugar" Shane Mosley. Ortiz (29-2-2, 22 KO) is making his first defense of the belt he won in an April Fight of the Year candidate over Andre Berto.

To say that six months ago, nobody expected Ortiz to be in this position would be an understatement. After a somewhat up-and-down career, which has always been loaded with promise, the 24-year-old slugger is standing at the mountain top tonight, facing down one of the biggest stars of his generation, and a future Hall of Famer.

Mayweather, 34, is looking to add another belt and another big win to his already-amazing career, and he's facing the man who is the best welterweight in the world today not named Manny Pacquiao or Floyd Mayweather.

We'll be here with round-by-round updates in the comments, followed by immediate post-fight analysis.