UFC

It wasn't just the men of the UFC who went toe-to-toe in Vegas this weekend ... the women were also squaring off ... in the Vegas nightclubs.

UFC fighter Joe Riggs might be part mutant -- 'cause check out how well his gunshot wounds healed up in just THREE SHORT MONTHS!!

As we previously reported, Riggs was cleaning his pistol back in July when it accidentally fired -- sending a bullet ripping through his hand and thigh. It was bloody ... and could've been career-ending.

But as you can see in the pics, everything seemed to heal nicely -- and Joe just announced that he's booked his very first UFC fight since the incident.

The fight is set for Dec. 13th -- and Riggs is all set to take on Ben Saunders ... who, to our knowledge, has zero gunshot wounds.

We included the original bloody gunshot pictures below ... but be warned, they're pretty gnarly.

The UFC has fired Thiago Silva ... again ... after footage of the fighter holding a GUN and accusing his wife of hiding a man in the house surfaced online.

The footage was shot by Silva's estranged wife Thaysa in early 2014 ... when Thiago pulled out a pistol and began threatening her because he believed she had another man in their home.

At one point in the video, Thaysa says she's recording so officials would have proof in case he killed her that day.

Of course, Silva was recently let off the hook in Florida -- where he was accused of pulling a gun on Thaysa at a martial arts studio and threatening to kill her in February -- because prosecutors said they didn't have enough evidence to get a conviction.

UFC honcho Dana White had initially banned Silva from fighting in the octogon ever again ... but reinstated him when charges were dropped.

Now, with this new footage coming to light ... White has fired Silva again. We're guessing Thiago has finally run out of of second chances.

Thaysa told a Brazilian media outlet that she has moved on from Thiago -- and is now living in Abu Dhabi with "a real man by my side."

Transgender MMA fighter Fallon Fox is firing back at UFC champ Ronda Rousey -- telling her to cut out the excuses about "bone structure" ... and FIGHT HER ALREADY!!!

Fox -- who was born a man -- is clearly upset with Rousey for saying it's "unfair" for Fallon to fight against naturally born women because she has a biological advantage.

FYI -- Fox beat her last female opponent so badly, the challenger suffered a broken orbital bone, needed 7 staples in her head and may have had a concussion.

But Fox says Rousey's argument is BS ... saying, "I really wish Ronda would stop with the ridiculous bone structure arguments. That was so last year."

She added, "[Rousey] should tell her boss to put me in that octagon over there at UFC."

In her statement, which she posted on Facebook, Fox continues ... "I'm quite sure that there are quite a few female MMA fighters who have guts to fight another skilled woman without peeing their panties and saying 'No, I wouldn't fight her!'"

"I think they may be a little more mentally tough and say, 'I'll fight a trans woman, just like I'll fight a lesbian woman or a black woman Etc.'"

Fox says certain fighters use the "bone density" argument to "possibly save face" if they lose to her in the ring.

Ronda Rousey tells TMZ Sports ... she believes transgender MMA fighter Fallon Fox has an "unfair advantage" over naturally born women -- but she'd still kick her ass anyway.

Rousey was at LAX when we asked about Fallon -- a post-op transgender who was born a man and now fights with the women.

FYI -- Fox has won her last two fights ... and beat her last opponent so badly, she reportedly suffered a concussion, a broken orbital bone and required 7 staples in her head (video below).

Rousey -- the reigning female UFC champ -- says she's done a lot of research on the situation ... and ultimately feels Fox needs to be fighting with the men -- especially with the damage she's inflicting.

UFC badass Lyoto Machida is about to get to the bottom of a mystery -- a bottom mystery -- 'cause the pro face breaker just told TMZ Sports why women in his native Brazil have such nice ... assets.

Machida was out in Beverly Hills with his smokin' hot wife when our camera guy asked the question that women all over the world want to know -- how do Brazilian chicks get their mystical booty powers???

Check the video -- Machida gives our camera guy two reasons Brazilian chicks are so bootylicious.

UFC superstar Nick Diaz was arrested for DUI in California last week -- and cops say to make matters worse, he attempted to "destroy evidence" by trying to make himself puke.

We've learned ... Diaz was pulled over around 2AM on Sept. 6th in Lodi, CA for a routine traffic violation -- and during the stop, cops say they noticed Diaz appeared to be wasted.

Diaz was taken to a nearby jail -- where cops say he went to the bathroom and attempted to make himself vomit in what seems like an effort to get the booze out of his system.

For the record, cops say Diaz was unable to pull his own trigger -- and never actually barfed.

He was eventually hit with 4 charges -- misdemeanor DUI, driving on a suspended license, obstructing a police investigation and destroying evidence.

Diaz -- who's supposed to fight Anderson Silva in January -- was eventually released on his own recognizance.

The UFC issued a statement saying they are aware of the situation and are gathering the facts.

Thiago Silva just scored the biggest victory of his life -- prosecutors DROPPED all of the charges against the ex-UFC star stemming from an alleged domestic violence incident earlier this year that ended with a S.W.A.T. team standoff.

As we previously reported, Silva was arrested in South Florida February 6th after rolling up to an MMA studio and allegedly pointing a gun at his wife.

He was initially charged with attempted murder -- but that charge was quickly thrown out. Instead, Silva was hit with two counts of aggravated assault with a firearm.

But TMZ Sports has learned ... prosecutors decided to nuke those charges as well -- which means Silva is essentially off the hook.

The Broward County Attorney's Office tells us ..."All charges against Thiago Silva were dropped. The victim was uncooperative, and investigators determined that she has likely moved out of the country."

Silva's attorney, Scott Saul, says the fighter has always proclaimed his innocence and is looking forward to moving on with his life.

"Thiago was described as some sort of rabid bird, [the allegations] made him look like a crazy person. But he was not," Saul says.

After Thiago's arrest, UFC honcho Dana White swore he would NEVER allow Silva to fight in the UFC again. It's unclear if he'll change his position now that Thiago is in the clear.

If you can't execute a rear naked chokehold, you're looking at a group of chicks you have no chance of scoring with ... ever.

TMZ Sports spoke with the cast of UFC's "The Ultimate Fighter 20" (which starts next week on Fox Sports 1) ... bona fide bad ass chicks ... who tell us they only date dudes who are as deadly as they are.

The lovely (and lethal) ladies were out in NY when we asked them if guys are (rightfully) intimidated by them ... being they could prolly beat up most of the Earth's human population.

Peep the clip -- the ladies make it clear the type of men they date would never be intimidated by ANYONE.

UFC fighter Luke Rockhold worked on his grip Tuesday in Thailand ... and by that, we mean he grabbed a tiger by the balls -- and now the UFC fighter is apologizing.

The 29-year old middleweight posted a pic of the impromptu animal physical online ... only to issue an apology a short time later.

Rockhold tweeted, "For those of u who think it was disrespectful I'm sorry. Was so minor just joking around. I was way too scared and would never do anything harmful to any animal."

Believe it or not ... there are several tiger parks all over Thailand ... and taking pics with the giant cats is a super popular thing to do.

Ex-MMA star War Machine took a stab at a porn career after he was kicked out of the UFC -- but was quickly blacklisted after beating up several porn people ... so says XXX star Brooke Haven.

Haven tells TMZ Sports ... she invited Mr. Machine to her birthday party back in 2009 after they performed a sex scene together.

But when he got to the party, Haven says someone hit on the fighter's date -- and things got violent ... quick.

According to Haven, Machine didn't just ruin the party -- he ruined his shot at a porn career ... because after the "massacre," no one wanted to work with the guy again.

Jon "Bones" Jones will not defend his light heavyweight belt at UFC 178  -- he just had to bow out of the fight with an injury he suffered during training.

Jones was supposed to take on Daniel Cormier as the main event at UFC 178 in Las Vegas on September 27 -- but the bout will now move to UFC 182.

Jones reportedly hurt either his leg or ankle while sparring.

This is the 2nd big change for this fight. Jones was originally supposed to fight Alexander Gustafsson ... but he got injured, and Cormier stepped in to get his shot against Jones.

UFC 182 is set to go down in January.

Of course, Jones and Cormier already scrapped at a media event to promote their fight. Guess, we'll have to be happy with that footage for the next few months.

UFC fighter Joe Riggs has a huge hole in his leg, and another in his hand ... but he's still vowing to fight again as early as December -- which is unbelievable when you see how badly his hand was injured in a gun accident.

TMZ Sports broke the story ... Riggs was cleaning his Sig Sauer 1911 pistol last month when the weapon discharged, blowing a hole in his left leg. He also severely jacked up his left hand. Fair warning ... these pics of the damage are gruesome.

We're told Riggs' doctors are only willing to say he will "eventually" make a full recovery -- but the fighter is confident he'll be ready to go before year's end.

Jon Jones and Daniel Cormier couldn't wait until September 27 to fight ... so they brawled Monday in the middle of the MGM in Las Vegas ... and this one didn't look fake at all.

Jones and Cormier got nose-to-nose, which Cormier was not into ... so he shoved Jones away. Clearly Jones was not pleased, so he went after Cormier and the two knocked the backdrop over before tumbling off the stage.

UFC's hottest ring girl Arianny Celeste is no player hater ... she's an appreciator ... and she's giving mad props to one UFC fighter for absolutely SLAYING IT with the ladies.

Celeste was flaunting her killer physique out at the pool at the Mandalay Bay for UFC International Fight Week ... when we asked her who she thought was the best looking fighter around.

It didn't take her long to name Urijah Faber -- and says she's not the only one who feels that way because the dude "pulls mad chicks!"

BONUS: Some of the other ring girls were also out in bikinis and doing their thing yesterday ... so, you might wanna check that out too!

HAPPY 4TH!!!!

UFC star "Filthy" Tom Lawlor can now add wrestling manager to his resume ... and based on the footage of him training with his clients before the match -- the fighter is taking the gig very seriously.

Filthy appeared alongside a tag team called reDRagon at ROH Wrestling's pay per view "War of the Worlds" Saturday in New York ... during their match against The Young Bucks.

The fighter's tag team was victorious -- and we're told Lawlor is open to working with the company again in the future.

Watch your back Jimmy Hart.