Boxing

Good news: Boxing champ Adrien Broner scored a sweet cameo on "Love & Hip Hop: Atlanta."

Bad News: You won't actually see it because Broner angrily stormed off set before cameras even starting rolling.

Boxing star Antonio Tarver says he "vehemently refutes" reports that he failed a drug test before his August fight with Steve Cunningham ... saying, "I am 100% innocent."

Tarver is responding to an article on SI.com -- which says he tested positive for synthetic testosterone, which is considered a banned substance.

But Tarver says he "categorically denies taking any banned substance before his fight with Cunningham."

"I have no idea how my urine sample tested positive because I didn't take anything illegal," Tarver said.

"Either the test was contaminated, or mixed-up with another sample. We believe in the process and I will fully comply. Further analysis will prove I'm 100% innocent because I've done nothing wrong."

Boxing superstar Amir Khan has a pretty insulting message for Floyd Mayweather -- Cluck. Cluck. Cluck.

The 28-year-old champ is seriously pissed off at Floyd -- and Manny Pacquiao -- calling them both out for refusing to fight him in the ring ... and comparing Mayweather to poultry in the process.

"I wanted the Floyd Mayweather fight," Khan told Boxing News ... "Floyd in a way he chickened out, he didn’t give me the fight. Three years he was saying he was going to give me the fight, then he didn’t give me the fight."

When the Mayweather fight fell through, Khan turned his attention to Pacquiao -- but that deal fell apart earlier this month, with Khan claiming Pacman was dragging his feet.

Shannon Briggs is taking some time off from terrorizing Wladimir Klitschko ... to create a new video game he says will feature one of the most famous voices in hip-hop ... DJ Khaled!!!

TMZ Sports spoke with Shannon (always fun) who told us he was banging around in a south Florida gym with Khaled recently when he spit an idea at him ... to play the part of announcer in his new game "Let's Go Champ Boxing."

Briggs says the world famous DJ jumped at the opportunity -- and the two men are hashing out the details as we speak ... as well as working in the gym to give Khaled that championship body.

No word on when the game will be out ... but Shannon says he's got four more video games ... and get this ... a grill of his own in the works.

So, maybe he'll forget about you Wlad ... wait, not a chance.

Boxing superstar Gennady Golovkin says he's ready, willing and able to fight Floyd Mayweather once he disposes of David Lemieux next weekend ... telling TMZ Sports, "I'm ready."

Triple G was in L.A. training for his big October 17th fight -- when he told us he's still focused on taking down Lemieux ... but it's clear he's itching for his shot to beat the crap out of Money May.

What's interesting ... we asked if Gennady would settle for a bout with Manny Pacquiao if Floyd chickens out -- but Triple G shot that down saying, "Manny's too small."

Boxing was very, VERY good to Shane Mosley -- 'cause the guy has roughly $10 MILLION in the bank, which is awesome ... but nowhere NEAR the kind of money Floyd Mayweather rakes in.

Mosley had to declare his income and expenses to the court as part of his divorce from Jin Mosley ... and in the court docs obtained by TMZ Sports, Shane states he's got $14.6 MILLION in total assets and $4.8 mil in debts.

Overall, he's in pretty good shape ... with a net worth of $9.7 million.

So, what does he spent his money on?

-- $4,899-per-month on clothes (gotta stay fly)
-- $11,600-per-month on entertainment, gifts and vacation (gotta do cool stuff)
-- $4,736 on restaurants (gotta eat)

But get this ... despite all the cash -- Mosley says he owns an economical and environmentally friendly Chevy Volt (though he also has a Bentley).

Justin Bieber made a French Polynesian paradise that much better for a group of well-to-do vacationers ... by giving an impromptu performance during karaoke night.

Biebs has been vacationing in Bora Bora with Floyd Mayweather -- while Money celebrates new found retirement.

We're told the two stopped by their hotel's bar during karaoke night on Saturday ... when Justin decided to treat everyone to -- of course -- his own song, "What Do You Mean," before getting on piano and playing "Let It Be."

The 25 in attendance weren't exactly JB's target demo ... but enough Tahitian Sunrise cocktails can turn anybody into a fan.

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 ...