Floyd Mayweather vs Manny Pacquiao: Tale of the Tape

Floyd Mayweather and Manny Pacquiao will soon let their fists fly, colliding in an historic pay-per-view (PPV) main event inside MGM Grand Garden Arena in Las Vegas, Nevada, after five years of agonizing negotiations and shenanigans.

It's a 147-pound showdown, which was made official after yesterday's weigh-in event (see full results here), with Mayweather's WBC and WBA (super) titles on the line against Pacquiao's WBO belt. If Pacquiao defeats Mayweather, he would become the first man in boxing history to become lineal champion in five different weight classes.

That means, throughout his illustrious career, the eight-division champion was at some point the best Flyweight, Featherweight, Junior Lightweight, Junior Welterweight and Welterweight in the world without question.

Mayweather, meanwhile, is a five-division champion in his own right, boasting an unblemished record (47-0) and a reputation as the best boxer of his generation, which includes Pacquiao. The "Money" legend would only grow bigger with a win over the Filipino, who is viewed as the last man standing for Mayweather to cement his legacy as the best boxer of all time.

Even though Mayweather plans to continue competing again after Pacquiao.

In addition to the "Tale of the Tape" above, check out a few fast facts about Mayweather (read full breakdown here) and Pacquiao (read full breakdown here) ahead of showtime, as well as some other event-related particulars.

Name: Floyd Mayweather Jr.
Age: 38
Record: 47-0, 26 KO
Last Five Fights: Marcos Maidana (UD), Marcos Maidana (MD), Saul Alvarez (MD), Robert Guerrero (UD), Miguel Cotto (UD)
Significant Victories (Other than those mentioned above): Juan Manuel Marquez, Ricky Hatton, Oscar de la Hoya, Shane Mosley, Zab Judah, Jose Luis Castillo (x2), Diego Corrales, Angel Manfredy, Genaro Hernandez.

VS.

Name: Emmanuel "Manny" Pacquiao
Age: 36
Record: 57-5-2, 38 KO
Last Five Fights: Chris Algieri (UD), Tim Bradley (UD), Brandon Rios (UD), Juan Manuel Marquez (KO Loss), Timothy Bradley (SD Loss)
Significant Victories: Timothy Bradley, Juan Manuel Marquez (2x), Miguel Cotto, Ricky Hatton, Oscar de la Hoya, Marco Antonio Barrera (2x), Erik Morales (2x), Lehlo Ledwaba.

Mayweather is the odds-on favorite to win tonight, but that gap has narrowed throughout the week (check out the latest Mayweather vs. Pacquiao odds right here). He is the physically larger fighter, as our Tale of the Tape indicates, but it's not always the size of the dog in the fight, but the size of the fight in the dog.

There are other outside factors, too, that could influence the final outcome. After all, boxing in "Sin City" has been unseemly in recent years. Nonetheless, here are the people charged with ensuring a clean, fair fight:

• Referee: Kenny Bayless
• Judges: Burt Clements, Dave Moretti and Glenn Feldman

"Clements gave Jessie Vargas -- the hometown fighter -- an inexcusably wide win over Anton Novikov in Aug. 2014. Moretti also gave Vargas the win by a huge margin and also scored a fight between Top Rank prospect Jose Benavidez and Mauricio Herrera 117-111 for Benavidez when our sister site Bad Left Hook had Herrera winning 118-110.

Feldman seems competent, though, having given reasonable scores in recent fights like Matthysse-Provodnikov and Lee-Quillin.

At the end of the day, though, it's boxing. Worry over judge integrity is just par for the course. We can only hope that all three who preside over Floyd Mayweather vs. Manny Pacquiao at MGM Grand Garden Arena in Las Vegas, Nevada, on fight night, as well as the promoters for both camps, are on their best behaviors."

MMAmania.com will deliver LIVE round-by-round coverage of "Mayweather vs. Pacquiao" TONIGHT, starting with the pay-per-view (PPV) broadcast at 9 p.m. ET RIGHT HERE.