UFC

NBA legend Paul Pierce is being sued over an altercation with a security guard in the stands at the Conor McGregor vs. Khabib Nurmagomedov fight ... TMZ Sports has learned.

The man behind the suit is Christopher Mostello -- who was working security at the T-Mobile Arena on Oct. 6, 2018, for UFC 229 when he got called over by a supervisor to respond to an incident involving Pierce.

Mostello claims he rushed over and was told Pierce had gotten aggressive and physical with the security supervisor -- a woman -- because she had asked for his ticket before allowing him back to his seat.

Mostello claims he was told Pierce grabbed the woman by the arms and pushed her to the side -- so he stepped in front of Paul to try and stop him.

But, Mostello claims Paul didn't stop -- instead Paul screamed "F*ck you" and accused Mostello of being a racist.

Footage of the altercation was captured by other fans in the stands and posted on TMZ Sports -- where you can clearly hear Pierce call the man a racist.

Mostello claims he's NOT a racist -- and he only engaged Pierce in the capacity of doing his job.

Now, Mostello claims his reputation has taken a serious hit and he's been subjected to public embarrassment, harassment and ridicule.

In the suit, filed by attorney Jesse Sbaih, Mostello accuses Pierce of defamation and intentional infliction of emotional distress. He's demanding more than $15,000 in damages plus attorney's fees and other costs.

This is amazing!!

Deontay Wilder has a massive fight this weekend ... but that didn't stop the heavyweight champ from hittin' up an NYC elementary school and delivering a rousing pump-up speech to the kids.

It all went down Monday afternoon at P.S. 288 -- a school for Pre-K to 8th graders -- in Brooklyn ... and the message was inspirational and heartfelt.

"I'm here to say I was just like you young guys, just in a different state, in a different city, different environment. Every time I woke, there was negativity," Wilder told the kids at the event put on by the "Game of Life" program, which focuses on helping children stay out of trouble.

"But, with you guys, you guys are powerful. Your words are powerful. The things you speak, the things you think. Your surroundings that you surround yourself around every day is powerful. And, I want you guys to know that."

Deontay continued ... "It took me 11 years to get here. Many people died near me. Many people labeled me as statistics to society ... 'You ain't gonna do nothing, you're bad.'"

The message is clear ... believe in yourself, follow your dreams ... and don't stop until you get where you wanna go.

Wilder ended the epic speech with a chant -- "Believe it, speak it!"

UFC star Johnny Walker says his shoulder surgery was a massive success and he wants to get back in the Octagon the next 2 months ... with the hopes of fighting Jon Jones by the end of the year.

Walker jacked up his left shoulder back in March while doing The Worm dance to celebrate a violent 34-second victory over Misha Cirkunov at UFC 235.

The 26-year-old underwent surgery right after the fight -- and tells us he's back in L.A. for a checkup with the doctor who performed the surgery.

The good news ... Walker -- who's on a 9-fight win streak -- says he feels great but doesn't want to rush his return, he wants to "heal properly" so he can fight at 100%.

Walker says he's still hoping to book 1 or 2 fights before he gets his dream match with Jon Jones ... who previously told us he's interested in fighting Walker too.

As for Jones, he's scheduled to take on Thiago Santos at UFC 239 in July ... and while Walker says he always supports his fellow Brazilians, he's conflicted this time because he wants to be the guy to give Jones his first loss.

"I want to beat Jon Jones," Walker says ... "I have to make history by myself."

Oh, and if you're wondering if Walker is ready to retire his "worm" celebration after the injury ... he ain't.

Conor McGregor is off the hook in his Miami phone smashing case -- prosecutors have dropped the charges against the UFC star after the victim stopped cooperating with authorities.

"The victim of the crime does not wish to return to the United States and prosecute this case," prosecutor Khalil Madani said during a hearing on Monday.

As we previously reported, McGregor was captured on video getting into an altercation outside the Fontainebleau hotel in Miami on March with Ahmed Abdirzak -- who was visiting from the United Kingdom.

In the footage, you can see McGregor snatch the guy's phone, stomp on it ... and leave the hotel with it.

He was arrested hours later and ultimately charged with felony robbery and misdemeanor criminal mischief.

But now, prosecutors say Abdirzak has left the country and doesn't want to come back to aid in Conor's prosecution ... which everyone saw coming from a mile away.

Here's why ... Abdirzak had filed a civil lawsuit against Conor -- which McGregor ultimately settled out of court.

Translation -- Abdirzak probably got a huge payday and wasn't exactly motivated to help put Conor behind bars.

This now clears the way for Conor to negotiate his next UFC fight without having to worry about being unavailable because of incarceration.

Khabib Nurmagomedov is not abandoning hope for a super fight against UFC legend Georges St-Pierre ... his manager tells TMZ Sports he's actively working on getting the two in the Octagon.

Ali Abdelaziz not only reps Khabib -- but he's also close with GSP and helped get Georges back into fighting after a 4-year layoff to take on Michael Bisping in 2017.

Georges won that fight -- but hung up his gloves in early 2019 saying, "You should retire on top."

Now, Ali says the fighters have expressed to him that a Khabib vs. GSP matchup would be a "dream fight" on both ends ... but the trick is getting everyone to agree on money and a weight class.

"It's about weight," Ali says ... "The problem is about weight. What weight class do we fight at?"

If the two sides can strike a deal, the fight wouldn't happen any time in the immediate future -- Ali says Khabib has two fights to get through before he could get to GSP ... including a title fight with Dustin Poirier later this year.

Of course, Conor McGregor is also still in the picture -- he's demanding a rematch after Khabib dominated him at UFC 229 back in October.

Ali says Khabib feels Conor needs to prove he's worthy of a rematch -- considering he's lost 2 of his last 4 fights in the UFC.

Jennifer Aniston went HAM on a fan trying to sneak a selfie vid with her on the street, but unlike Conor McGregor she won't be arrested for it ... 'cause it's all for TV.

Jen was shooting a scene for her new Apple TV+ show, "The Morning Show," in NYC Thursday night ... and it features her going off on a guy and snatching his phone.

Check it out -- Aniston unleashes an f-bomb rant and looks primed to punish the dude's phone, but fortunately ... Reese Witherspoon's there to talk some sense into her!

If only Conor -- or Offset for that matter -- had someone like Reese in their crew.

"The Morning Show" is an upcoming dramedy web television series starring Aniston, Witherspoon, Steve Carell, Gugu Mbatha-Raw and Billy Crudup. It's described as "an inside look at the lives of the people who help America wake up in the morning."

Camille Kostek is having a pretty great 2019 -- she's officially a Sports Illustrated Swimsuit Edition cover girl now ... and she lost her mind when she found out!

The former New England Patriots cheerleader -- who's also dating Rob Gronkowski -- was informed about the cover by the editor, MJ Day ... and immediately began bawling!

It's actually a really cool, raw moment.

Kostek first started working with SI back in 2017 -- and she's always talked about how modeling for the mag was a career goal. Congrats on the cover!!!

There are three versions of the SI Swimsuit Edition cover -- the other two feature Tyra Banks and soccer superstar Alex Morgan.

SI has also said the 2019 edition will feature other major female athletes including UFC star Paige VanZant.

As for Kostek, she just wrapped up a big weekend in Vegas celebrating Gronk's retirement from the NFL ... where the two danced their faces off and smashed cake by a Vegas pool.

Anderson Silva ain't mincing words when it comes to his message for Dana White ... telling TMZ Sports he wants a fight with Conor McGregor ASAP!!!!

"Come on, boss," Silva says ... "Give this show for the fans. Give this show for the fans of UFC."

Remember, Silva has pleaded with the UFC honcho ever since Conor said in October 2018 he'd be "interested" in scrapping with Anderson.

But, Silva tells us he's still dead serious about making the fight happen ... and he even explained to Dana why the UFC should set it up!!!

"It's good money for you, Dana. And, a good challenge for me and Conor."

Silva says the fight should take place at a 180 pounds ... which means Conor would have to go up from his normal 155-pound division -- but Anderson says it'll be worth it in the end.

"That's the good fight for me and Conor ... It's a super, super, super fight."

Ex-UFC star Anthony "Rumble" Johnson was arrested for domestic violence Monday night after admitting he got physical during an argument with his girlfriend, TMZ Sports has learned.

According to the police report, obtained by TMZ Sports, a woman called police to report an altercation with her boyfriend, Anthony Johnson.

The woman claimed she had started to pack AJ's belongings to throw him out of the house when he forcefully picked her up -- "put her in a football hold" -- and carried her into another room.

The woman claims "she was scared due to his size and martial arts experience."

FYI, 35-year-old Johnson is a former UFC star who was 22-6 as a pro -- with wins over stars like Glover Teixeira, Ryan Bader and Alexander Gustafsson.

Cops say the woman did not have any visible injuries.

When cops spoke with Johnson that night, he admitted he had grabbed the woman and carried her during the argument -- but says his intention was never to hurt her. Johnson claimed he simply didn't want to argue anymore.

Cops determined Johnson's actions warranted a domestic violence arrest -- so they took him into custody and hauled him to a nearby station where he was booked on a misdemeanor domestic violence charge.

Johnson retired from the UFC back in 2017 -- after losing to Daniel Cormier. His profession on the police report is listed as "body building."

UFC champ Rose Namajunas says she wouldn't rule out a superfight against Valentina Shevchenko ... but first, she's gotta get through Jessica Andrade.

Rose is the reigning UFC strawweight champ (115 lbs) after posting two amazing wins over UFC legend Joanna Jędrzejczyk.

She's gearing up for a title defense against Andrade this weekend at UFC 237 -- and despite being the champ, Rose is the betting underdog going into the fight.

"It's definitely a familiar feeling. This is not something new. I'm always the underdog. Not always, I shouldn't say that, but generally speaking," Namajunas told us.

"And, it makes sense. Andrade, when you look at her highlights, when you look at her physique, and you look what she does to girls, it's pretty intimidating."

Andrade's a beast ... but if she wins, would Rose -- who's cleaned out her division -- go up a weight class and fight the 125 lb. champ, Shevchenko?

"I've trained a lot with Valentina. Definitely, the training sessions, the way she trains, she's an animal. Of course, I'd love to test myself against her."

The issue? They're friends ... but Thug Rose ain't above punching her buddies.

"She's also my friend too, so that would kinda be strange. But, it's whatever, like I've fought friends before multiple times."

Conor McGregor spent his Monday training his ass off in his MMA gym in Ireland -- and sources connected to the UFC star tell us he's "ready to fight right now."

Conor had a sparring session with Hans Molenkamp -- who created the MMA equipment company, Triumph, and runs the Monster Energy combat program. He's also a black belt in Brazilian jiu-jitsu who trains with some of the best fighters in the world.

Hans and Conor have been tight for years -- so, when Hans touched down in Ireland, Conor invited him to Straight Blast Gym for a workout.

Our sources at the gym tell us ... Conor looked sharp in sparring sessions -- even cracking Hans in the face with that legendary left (you can see it in the video).

We're told Conor is training like he's getting ready for a fight -- and he's been talking about how badly he wants the rematch with Khabib.

One source extremely close to McGregor put it this way -- "He's ready to fight now. He's in training. Everything needs to line up correctly ... opponent, place and of course, money."

Conor was called out this weekend by UFC legend Donald "Cowboy" Cerrone -- McGregor has yet to respond.

Great news for UFC star Brian Ortega ... the 27-year-old says he's been medically cleared to return to the Octagon -- and he's got his sights set on a rematch with Max Holloway.

Ortega suffered a broken nose and a broken thumb after his Dec. 8 bloodbath with Max at UFC 231 ... a fight Brian ultimately lost when the doctor stopped it at the end of the 4th round.

Brian fought his ass off -- and later said he was "willing to die" in the Octagon.

After the fight, Ortega underwent surgery -- which was successful -- and now the featherweight star tells us he's looking to book a fight as early as July.

Unclear who the opponent will be -- but Ortega says the ultimate goal is to earn another crack at Holloway, an opponent he has tremendous respect for.

Ortega says he's replayed the Holloway fight in his head -- and knows he can win the second time around.

Sylvester Stallone says Conor McGregor "absolutely" deserves an ownership stake in the UFC -- and he's willing to work with the Irishman to make it happen.

Now, how serious is Stallone? Hard to tell ... but we do know Sly really does care about the guy and thinks he's a special fighter.

We also know Conor is dead serious about his demands for shares in the UFC -- despite Dana White repeatedly saying it ain't gonna happen.

Back in 2016, Mark Wahlberg made a very REAL offer to Conor -- saying he'd sell him some of his ownership ... but Conor needed to "cut the check."

Just this week, Conan O'Brien joked that Conor would need to fight him for his piece of the UFC.

But, Conor ain't kidding around -- making his demands clear back in March.

"Give me my rightful shares in the UFC company," Conor said ... "That’s all I ask."

9:40 AM PT -- CoCo's in trouble ... 'cause Conor's taken notice, saying he's totally down for a fight ... and even threw Mark Wahlberg into the mix as well!!!

"Challenge accepted Conan!" Conor tweeted. "I'll whoop you and Walhberg (sic) in the same night."

"Double shares for the Double Champ!"

If Conor McGregor REALLY wants a piece of the UFC, he's gonna have to get through Conan O'Brien first!!

CoCo was leaving UCLA on Wednesday after participating in a college signing day event with Michelle Obama when we brought up the fact he happens to be a minority owner of the UFC.

And, with Conor making so much noise about wanting an ownership stake in the company, we asked Conan if he would follow Mark Wahlberg's lead and offer to sell Conor a piece of his share.

"I will fight him for his [share]," Conan joked ... "If he can take me in the Octagon!"

O'Brien continued to tease ... saying he'd have to look at the paperwork before making any serious deal with Conor.

Look, he's obviously joking the whole way through -- but Conor wasn't kidding when he demanded ownership.

In fact, Conor still isn't signed on to take another fight in the Octagon after retiring via social media earlier this year.

Brock Lesnar was submitted to official PED testing just WEEKS before he told Dana White he was retiring from MMA for good, TMZ Sports has learned.

We spoke with a rep for the United States Anti-Doping Agency which performs all of the testings on UFC fighters and confirmed Lesnar has not only been in the testing pool, but submitted 9 samples over the past year.

In fact, Lesnar submitted two tests in 2019 -- once in the 1st quarter (January through March) and at least once in April.

USADA confirms Lesnar was tested once between April 1 and April 18. We're checking to see if he was tested after April 18.

USADA would not disclose the results of Lesnar's recent tests.

Lesnar has had problems with USADA in the past -- he tested positive for the banned substance clomiphene after his UFC 200 victory over Mark Hunt. That victory was later overturned and Lesnar was suspended for a year because of the positive test.

Of course, the UFC had been gunning to book Lesnar for a title fight with heavyweight champ Daniel Cormier.

Lesnar famously stormed the Octagon back in July 2018 and shoved Cormier in what appeared to be an obvious publicity stunt to drive interest in the fight.

Both Dana White and Cormier have talked openly about wanting to make the fight happen.

But this week, White told ESPN the Lesnar fight is off because Brock informed him he is retiring from MMA.

Legendary announcer Bruce Buffer was front and center when the UFC made 12 Make-A-Wish dreams come true ... and he says it's a moment he'll remember for the rest of his life!!

Dana White and his org teamed up with the Make-A-Wish Foundation to grant 12 Las Vegas kids their biggest dreams on Monday -- from trips to Disneyland and Disney World to Europe and more!!

TMZ Sports spoke with "The Veteran Voice of the Octagon" -- who used his famous chops for the big reveal to the kids ... and he says it was one of the most emotional experiences of his life.

Buffer revealed it was a local record for Make-A-Wish giveaways ... and admits it was tough not to get emotional during the touching event.

"It was a beautiful event. It was great to see those kids," Buffer says.