UFC

UFC honcho Dana White took the stage Tuesday evening at the Republican National Convention and praised Donald Trump as a loyal friend who's had his back since day 1.

White opened his speech by saying "I'm sure most of you are wondering, 'What are you doing here?'" -- but went on to explain how Donald was the first person to support UFC when White and his partners bought the business in 2001.

Long story short, White says Trump is the kind of fighter America needs ... and has all the tools to be a kickass president.

White appeared on the "TMZ Sports" TV show a while back and explained why he's Team Trump for life.

Brock Lesnar may have caught a break -- because despite the fact he allegedly tested dirty TWICE, he'll only face punishment for one violation ... sources familiar with the situation tell TMZ Sports.

It all has to do with the dates Brock's samples were collected ... and when he was notified about the results.

In Brock's case -- he was tested on June 28th and July 9th. But he wasn't notified that his June test came back dirty until July 14th ... 5 days after his second test.

Our sources tell us ... because he wasn't notified until after the second sample was collected, he will only be punished for one violation.

The punishment for a first time banned substance user can range from a warning to a 2 year suspension ... though it can be raised to 4 years if the infraction is determined to be an "aggravating circumstance."

Brock Lesnar tested positive for a banned substance on the DAY OF UFC 200 ... this according to the UFC.

The U.S. Anti-Doping Agency notified the UFC that a sample collected on July 9th tested positive for the same substance that was found in Brock's 1st failed test, which went down on June 28th.

Holly Holm says she's pretty damn sure she's clean -- because she's been tested for PEDs 14 TIMES in 2016 ... one more than Conor McGregor.

Holm was addressing the media before the big fight this weekend with Valentina Shevchenko -- when she said she's been more than any other fight in the UFC.

"Friday was number 14 just within the last year."

In video posted by MMAFighting.com (around 36:25), Holm says officials usually collect both blood and urine samples for testing.

With Jon Jones and Brock Lesnar dominating the news for allegedly flunking PED tests -- fighters need to be more careful than ever about what they put into their system.

One more thing ... Holm was also asked if she regretted taking a fight with Miesha Tate before a big money rematch with Ronda Rousey.

"I 100 percent stand by [my decision]," Holm said ... "because we're still waiting for Ronda to come back."

How does Conor McGregor relax when he's in L.A.? Segway trips on Venice Beach.

Check out the UFC superstar rollin' through the area ... hittin' hat shops, sippin' on pressed juice and most importantly -- taking pictures with any fan who wants a shot!

Love him or hate him -- gotta admit, Conor's always good to his supporters.

Jon Jones says he's NOT A CHEATER -- and says he still believes he can clear his good name.

Of course, Jon was yanked from UFC 200 after he tested positive for 2 banned estrogen blockers -- which are typically used in tandem with certain performance-enhancing drugs to limit side effects.

He has been temporarily suspended from fighting in Nevada -- and a hearing is expected for later this year.

But Monday afternoon, Jon went to Twitter to plead his innocence.

"Don't write me off just yet, I know in my heart that I'm not a cheater," Jones said.

"I trust in the system to help me prove it."

CM Punk doesn't deserve to be in the UFC -- and will likely get his ass beat in his UFC debut because he's not a real fighter ... so says UFC fighter Lorenz Larkin.

Larkin has been a pro fighter since 2009 -- and essentially lays out why allowing the former WWE superstar in the Octagon is an INSULT to the sport.

You gotta watch this clip ... Larkin throws the SHADE OF THE YEAR -- and says he'd be worried for Punk's life if the UFC ever allowed the two to square off.

"The UFC doesn't have enough insurance for what I'd do to him."

FYI, Punk makes his debut at UFC 203 in September -- we'll see if Larkin's right.

Jean-Claude Van Damme has a brand new 'Kickboxer' costar -- UFC fighter Roy "Big Country" Nelson ... and we're told the heavyweight CRUSHED IT on the set.

Conor McGregor's on the fast track to ANOTHER ass whoopin' ... so says Urijah Faber who tells TMZ Sports the Irish superstar just doesn't have what it takes to beat Nate Diaz.

Faber tried to help Conor prepare for his last fight against Diaz, but his advice fell upon deaf ears.

Now, Urijah says ... despite all of the positive things Conor has going for him -- like toughness and skill -- a victory in the rematch is simply out of the question.

By the way, we also asked 37-year-old Urijah if he was planning on retiring any time soon ... check out what he says.

Mark Hunt is FURIOUS over Brock Lesnar's potential failed drug test ... DEMANDING half of B.L.'s UFC 200 winnings ... or he's bolting the UFC.

Hunt laid it all out on his website Friday night ... saying, "I've told Dana I want half of Brock's purse."

FYI -- Lesnar reportedly made $2.5 MILLION ... plus a percentage of the massive pay-per-view take.

"This is the third time I've had to fight a cheater in my career. The other two times I didn't ask for compensation, but this is the third time and I'm sick of them getting away with cheating."

If he doesn't get Brock's cash, Hunt says he wants out of his UFC deal. "I've told Dana that I want a release from the UFC if they don't sort this out."

The UFC has not yet responded to Hunt's ultimatum.

Nooooooooooooo!!!!!

The UFC announced Brock Lesnar has been flagged by the U.S. Anti-Doping Agency for a potential violation stemming from a pre-UFC 200 test.

Ronda Rousey just shared some very interesting advice she got from her mom -- "Winning is a bitch. But revenge is a motherf*****."

Ronda was speaking at the Women in Action female empowerment event in Chicago earlier Friday -- when she talked about advice she got from her athlete mom about bouncing back after a loss.

The crowd went wild for Rousey -- who was pretty pumped up!

Does this mean she wants another crack at Holly Holm?

She also said, "I want to win my belt back."

Alistair Overeem is so confident he'll destroy Stipe Miocic at UFC 203 -- he's calling his round!!!

Overeem was out in Vegas recently when we asked about his big title fight with the UFC heavyweight champ in September ... a fight in which Alistair will be gunning for his 5th straight victory.

You can tell his confidence is through the roof.

Dana White confirms to TMZ Sports ... he WILL be speaking at the Republican National Convention next week to talk about his relationship with Donald Trump.

The UFC honcho has been very vocal about his support for Trump -- and previously appeared on the "TMZ Sports" TV show on FS1 and explained why he's got Donald's back no matter what.

As for White's RNC speech -- Dana says it won't be political ... but rather, "It will be about my relationship with Trump and the Trump that I know."

Forget Luke Rockhold, Michael Bisping had ANOTHER challenger waiting for him when he got home Wednesday night -- his 15-year-old son ... who threw down with dad right in the middle of their house.

Turns out, Callum Bisping is a high school wrestler -- a pretty good one -- and he tried to test his skills against the UFC middleweight champ.

Check out the clip ... not bad for a 15-year-old. Even Michael admits his days as the alpha male in the house are numbered.

Here's UFC ex-champs Holly Holm and Miesha Tate going full thespian in a scene from their new movie ... and TMZ Sports is the only place you can see them in action ... for now.

Tate and Holm are starring together in an upcoming film called "Fight Valley" dropping later this year, and we got a sneak peek at an intense scene between the two bantamweight beauties.

Check out the clip -- there's some pretty tough talk between the ladies (who actually fought not too long ago) and if you pay close attention you can see a quick shot of new UFC star Cris Cyborg.