Diego Corrales (R) finishes off Jose Luis Castillo on May 7, 2005 (AP)May 7 is a significant day in boxing history, for good and bad reasons.

On May 7, 2005, one of the greatest fights in the sport's history occurred at the Mandalay Bay Events Center in Las Vegas, when Diego Corrales and Jose Luis Castillo put on an epic match in a battle for the lightweight title.

They went at each other with a fury for nine fast-paced rounds. Castillo, though, seemed on the verge of an historic victory in the 10th when he knocked Corrales down twice. Corrales' eyes were swollen almost completely shut and he was on unsteady legs when he arose after the second knockdown.

When the action resumed, Corrales landed a huge straight right that badly hurt Castillo. Always a great finisher, Corrales jumped on him and landed a series of savage blows that forced referee Tony Weeks to jump in and save Castillo. Neither man was ever nearly close to the same fighter again.

Tragically, two years to the day later, Corrales died in a motorcyle accident in the shadow of Mandalay Bay. The

Justin Bieber, Lil Wayne, 50 Cent and Yuriorkis Gamboa celebrate Mayweather's win (Hoganphotos)LAS VEGAS — Minutes after he defeated Miguel Cotto Saturday in one of the better all-around performances of his career, Floyd Mayweather Jr. seemed to be speaking directly to Manny Pacquiao when he addressed the feasibility of a fight between the top boxers in the world.

Essentially, what Mayweather said to Pacquiao, who arrived in Los Angeles from the Philippines on Saturday at about the very moment Mayweather was about to start his match with Cotto, was dump promoter Bob Arum and we have a fight.

It's just been a problem trying to make this fight. The fans and the public are being fooled. Bob Arum does not want to make this fight happen. Once he's free from Bob Arum, will the fight happen? Absolutely.

Manny Pacquiao (Top Rank)Pacquiao is contractually bound to Top Rank, and if he tried to make some sort of end-run, Top Rank would undoubtedly sue and the courts would prevent him from fighting until the matter was determined. That would take way longer than a guy who doesn't have much time left in the sport

Floyd Mayweather is guaranteed $32 million Saturday (AP)LAS VEGAS -- What can you buy for $32 million? Well, late Saturday night, after his bout with Miguel Cotto at the MGM Grand Garden has ended, Floyd Mayweather Jr. will find out.

According to the Nevada Athletic Commission, Mayweather is guaranteed $32 million for Saturday's match for the World Boxing Association super welterweight championship, the largest guarantee for a boxer in history.

That, however, is only a guarantee. Mayweather will also take home a hefty share of the pay-per-view profits and will make significantly more. No one is saying, but Mayweather said during an interview on Tuesday that it could be upwards of $100 million.

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No doubt, that was hyperbole, but he's going to be paid very well for risking his 42-0 record against the Puerto Rican star.

His guarantee surpasses the $30 million guarantee given to Mike Tyson for his 1997 fight with Evander Holyfield. Cotto is guaranteed $8 million, so the