Boxing

Another huge blow to 50 Cent's boxing promotion company -- because the organization's biggest boxing star, Yuriorkis Gamboa, officially wants out ... TMZ Sports has learned.

Heavyweight champ Deontay Wilder wants to be the next Floyd Mayweather Jr. -- and already has a great a record, a title belt, and now he also has a baller exotic car to rival some of Floyd's.

Wilder's defending his PBC Heavyweight title Saturday night in Vegas, and sources close to the champ tell TMZ Sports he'll have a great prize waiting for him at home -- a brand new Lambo Aventador.

We're told Wilder dropped a grip of cash -- $560,000 to be precise -- on the 2015 whip, which retails for a paltry $398k. Wilder jacked up his price with some Alabama custom touches, like wrapping it in gator skin! Relax, it's not real gator ... just a print.

Wilder, known as the Bronze Bomber, also got Michael Koss at Exotic Euro Cars to slap on a coat of bronze. We're told Deontay bragged to Koss, he would knock out his Saturday night opponent, Johann Duhaupas.

Ronda Rousey says Floyd Mayweather Jr.'s finally getting what he deserves -- fans turning their backs on him in droves because he's just too damn boring in the ring.

Andre Berto got some new ammunition for smack talking Floyd Mayweather Jr., and he's already unloading on him -- blaming the champ for their fight's historically low pay-per-view numbers.

Somewhere between 400,000 and 550,000 people bucked up for the fight ... the lowest PPV stats for a Floyd fight in a decade. Berto tells TMZ Sports, "It’s definitely Floyd's fault, He left a sour taste in everybody’s mouth because of the Pacquiao bomb shell."

Berto thinks Floyd underestimates how much fans hate his style of boxing, and that's why they vowed to stop buying his fights -- "As you can see they weren’t bulls**ttin."

Ultimately the low PPV numbers hurt Floyd more than Berto, since Floyd gets a cut of that. Berto got a flat $4 million purse, but says he still tried to put on a good show ... unlike Floyd.

"I knew if he had the chance he would run around and make it boring, but I tried my best to not let that happen and disappoint the people. They deserve excitement.”

Rematch, anyone?

8-year-old boxing prodigy, Evnika Saadvakass, doesn't need a speed bag to show off her quick hands ... cause a hunk of wood works just fine for her.

Right now she looks more like Laila Ali but if she works on her ground moves she could definitely end up being the next Ronda Rousey of the UFC ... heck she's been training since she was the age of 3 after all.

50 Cent stepped inside a real life fight club, jumped in the ring ... and then got the joint hyped for a night of knockouts.

50 gave fans and fighters a pep talk before performing Tuesday night at BX Fight Club -- a genuine, underground fight club in the Bronx. The club encourages locals to put on the gloves and get their aggression out in the ring, instead of on the street with guns.

One of the owners, BX Hova, says the plan is to keep kids out of trouble. His pal Fif kicked off the night with "What Up Gangsta?"

Andre Berto may have lost to Floyd Mayweather in Vegas Saturday night, but he told TMZ Sports there was only one real fighter in the ring, and it wasn't Floyd.

Andre as much as said Floyd spent 12 rounds dodging and hugging him. For his part, Berto said he chased Floyd so much, he needed track shoes.

You gotta listen to Andre ... UNIMPRESSED with Mr. 49 - 0.

Jen Welter tells TMZ Sports ... she has not been asked to walk Floyd Mayweather to the ring to fight Andre Berto on Sept. 12th ... but the NFL's first female coach will be at the weigh in.

Welter says the person who originally confirmed that she would be in Floyd's entourage was a former employee who was not authorized to act as Jen's rep.

TMZ Sports was contacted by the person after submitting a media request through Jen's official website. Jen says the person should not have had access to the site ... and says the situation "is being resolved."

There is this though ... we're told Jen's REAL rep, Leslie Swan, has been in touch with Floyd's camp to discuss the possibility of walking Floyd to the ring, but no formal offer has been made.

Floyd Mayweather doesn't really have a solution for his big ticket catastrophe -- saying he's merely crossing his fingers and hoping that sales go up for his retirement fight with Andre Berto.

Floyd faced the media Tuesday -- where he was asked straight up if he was worried about the shocking lack of interest in the Sept. 12th bout ... with thousands of tickets still unsold.

"I just try to stay positive and keep my fingers crossed and hope for the best," Mayweather said.

Floyd then kicked the question over to Mayweather Promotions CEO, Leonard Ellerbe -- who said the slow sales are NOT concerning at all ... "normal business."

Yeah, maybe for most people ...

Wanna know what Larry Merchant WON'T be doing on Saturday night?

Watching Floyd Mayweather fight Andre Berto ... 'cause the legendary boxing commentator says that any Mayweather fight that doesn't involve GGG is a total waste of time.

Merchant was out in L.A. recently when we, of course, had to ask for his expert opinion on the huge fight (with the not so huge buzz) in Vegas this weekend.

That's when Merchant WENT IN on Floyd ... saying he won't watch because Berto is not a "serious opponent," saying that Floyd is afraid to fight the guy everyone wants to see him battle ... GGG.

BTW, it's not like Gennady Golovkin is afraid to fight Floyd -- in fact, he recently appeared on "TMZ Hollywood Sports" and called out the champ ... saying he'd beat Floyd's ass AND put on a show!

Check out the clip -- and remember that if this were 50 years ago, Larry would kick Floyd's ass himself.

The NFL's first female coach is getting some major support from an unlikely ally ... Floyd Mayweather ... who reached out to Jen Welter and offered her ringside seats to his next fight because he's a huge fan.

FYI -- Welter made history earlier this year when she was offered a coaching "internship" with the Arizona Cardinals ... working primarily with the linebackers.

We spoke with Welter's rep who tells us ... after her story attracted national attention, they got a call from Team Mayweather ... who offered 2 ringside seats to his upcoming fight against Andre Berto.

We're told Mayweather is a fan -- and wanted to show his support. As for Welter, she's flattered and we're told she's definitely planning on attending.

Manny Pacquiao's boxing career is on its last legs ... with his promoter saying the fighter will retire next year -- to focus on becoming President of the Philippines!

Bob Arum was out at Craig's Tuesday night when he told us Manny is planning to fight again next year once he heals up -- but that's probably the very last bout for the 36-year-old.

"He's gonna fight again next year but his goal is to become a senator in the Philippines, which he will be next year, and then to be president."

Arum added, "I think Manny will retire once he's elected to the Senate of the Philippines which is next year ... he's gonna hang up the gloves."

Here's a first ... Floyd Mayweather is using the Forbes list as diss fuel -- saying Ronda Rousey is still way too poor to be mentioned in the same breath as the boxing champ.

Chad Johnson thinks the animosity between Floyd Mayweather and Ronda Rousey is built up sexual tension ... and the only way to diffuse the situation is to hump it out.

After Ronda trashed Mayweather again this week ... saying he's illterate and she makes more cash-per-second than he does ... Johnson decided it was time to weigh in.

"Ronda Rousey & Mayweather might as well date & stop the verbal jabs at each other."

This video is HILARIOUS -- ya gotta watch as boxer Ricardo Mayorga straight up SLAPS Shane Mosley's girlfriend on the ass ... and violent pandemonium ensues.

If Floyd Mayweather is the master of self-promotion, Paris Hilton is the mistress -- and she used Floyd's purchase of a super rare $4.8 mil hyper car to let the world know her BF is super rich too.