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Boxing legend Shane Mosley wagered $1,000,000 on himself, betting he'd BEAT Canelo Alvarez in 2012 ... but unfortunately for Sugar, he not only lost the fight, he netted a NEGATIVE $400K in the process!!

The 50-year-old, former multiple-weight class world champion sat down with Mario Lopez for Triller's "OK Bet" show ... and made the stunning admission.

"They were gonna pay me $600,000 [for the Alvarez fight], but I made a bet for a million dollars that I was gonna beat Canelo, and if I would've won I’d have $6 million," Shane recounts.

"I was thinking this snot nose kid is not gonna beat me, you know at 154 (lbs)."

Sadly for Shane's bank account, he was wrong ... and instead of making millions like he would've with a win, he actually LOST hundreds of thousands of George Washington's after paying off his debt.

"I bet a million dollars and I lost so I ended up having to pay back 400,000 dollars. For getting my butt kicked I had to pay $400,000."

If you don't remember the May 2012 fight ... then-40-year-old Mosley took on a 21-year-old Canelo at the MGM in Las Vegas.

Alvarez was 40-0-1 at the time ... and held the lightweight title. But, Mosley, who'd won just 2 of his last 6 fights, and was nearing the end of his great career, believed he still had enough left in the tank to get the W.

After 12 rounds, Mosley ended up losing a 1-sided decision to the future top pound-for-pound fighter in the world ... with 2 judges scoring the bout 119-109, and the other, 118-110.

Shane retired 5 fights later in 2016. Since, the legendary pugilist has been inducted into the International Boxing Hall of Fame.

The woman who claimed she got kicked off an Alaska Airlines flight because she was too fat has been doing some self-reflection... and now she's going under the knife to slim down.

Manager of Ray Lin Howard, Gina Rodriguez,  tells TMZ … ever since last week's incident, Ray Lin's felt uncomfortable and judged every time she gets dressed and goes out in public, and now she's making a change.

We're told she's traveling to Beverly Hills next week to get gastric sleeve surgery to remove the majority of her stomach ... and her goal is to go from 350 lbs. to about 160.

As we reported ... Ray Lin claims she got kicked off an Alaska Airlines flight for wearing a revealing outfit, and says she was also harassed and discriminated against because of her weight. She described the incident as the worst example of "fatphobia" she's ever encountered.

To all those Chiefs fans who ain't feeling Travis Kelce's new baby-face look, we're sorry in advance ... 'cause the K.C. star tells TMZ Sports he might go beard-less -- ALL YEAR!!!

The 31-year-old broke down the plans for his facial fuzz out at LAX this week ... saying even though he got roasted for whipping out the razor recently -- he might just keep the fresh-faced drip all season.

What's interesting, though ... Kelce actually had some stubble going when we got him -- but he insisted that was merely a temporary thing.

"Nah, I haven't got a cut in a while," Kelce told us.

As for why he initially decided to trim his famous fur -- which he's become known for in his rise to NFL stardom in Kansas City -- he said bluntly, "Sometimes you gotta see your face!"

When we asked if he planned to keep that mentality all season, he added ... "We'll see!"

Beard or not ... we're pretty sure Kelce's going to ball out this season -- and he clearly feels the same way, telling us before jetting away from the airport, "We gon' get after it, baby!"

Today marks the 20th anniversary of the September 11 attacks ... and the man who caught President Bush's ceremonial pitch before World Series game 3 in NYC says #43 sent him a letter this week, commemorating the powerful moment.

TMZ Sports talked to former New York Yankees catcher Todd Greene -- who was Jorge Posada's backup at the time -- about that unforgettable October night in the Bronx, only 49 days after 9/11, when GWB fired a strike from the mound, symbolizing America's resolve.

"I get the same feeling too when you think back to that moment and how electric the stadium was that night and just what it meant for our President Bush to walk out on the field and as a symbol of strength, as a symbol of healing, as a symbol of unity for our country which is really, really important," Greene, who played 11 seasons in the big leagues, tells us.

"To hear the USA chants and then have President Bush give the thumbs up on top of the mount -- it was, again like you said, it will get the hairs standing on your arms now."

Of course, baseball season was in full swing when the terrorist attacks happened ... and the sport played a critical role in bringing back a sense of normalcy to America.

The 2 most unforgettable moments were Mike Piazza's go-ahead home run against the Braves 10 days after 9/11 ... and of course, Bush's pitch.

It'll never be forgotten.

The Yankees ended up winning the game (down 2 games to none, they had to), behind a strong performance from Roger Clemens, 2-1.

Greene -- who wasn't even supposed to be the catcher who caught the pitch -- says he hasn't spoken to Bush over the years, but did receive a letter in the mail on Wednesday from the former president.

"He sent me a personalized letter that I just received yesterday. President Bush saying how much that moment meant for him and that he was honored, well not honored, I was honored to be on the field with him at the time and just in remembrance of that moment."

Steve-O is literally LOL over Bam Margera's lawsuit against 'Jackass' producers, and says the legal battle has nothing to do with why the new movie's release has been delayed.

We got Steve-O at LAX and asked him why "Jackass Forever" is now dropping on February 4, 2022 ... instead of the originally planned date this October. Fans have been speculating it's because of Bam's pending lawsuit against Johnny Knoxville, the 'Jackass' team and Paramount Pictures.

The studio has said it's due to the rising COVID cases, but conspiracy-loving fans online called BS, and kept pushing the Bam theory. Well, Steve-O's doubling down on the company line, and his reaction to Bam's lawsuit might finally convince fans.

He couldn't hold back, and laughed off the case. In fact, he has just one word to describe it. As we reported ... Bam sued, saying he was forced to sign an agreement he claims amounted to psychological torture.

Steve-O had previously said the reason Bam's not in the fourth installment of the 'Jackass' franchise is that he couldn't stay sober. But now ... a lawsuit? Steve-O's baffled, to say the least.

Andre Royo -- one of Michael K. Williams' co-stars on "The Wire" -- says the entire 'Wire' family is feeling the loss ... but he's encouraging people to keep spreading the late actor's positivity.

Andre -- who played the drug addict and informant "Bubbles" on the popular HBO series -- was out in NYC Friday when he reflected on Michael's life ... saying he was someone who cared about everybody.

Royo tells us Williams' death was a stunner, but he hopes people will rally together to keep his name alive, remember his work, and shine his light ... because his former co-star was a great person, and clearly left a major impact.

As we reported ... Williams -- who played the beloved character Omar on "The Wire" before going on to star on several other hit shows -- was found dead Monday of an apparent overdose in his Brooklyn apartment.

Derek Brunson admits he lost to Israel Adesanya, fair and square, but says he wasn't right before the 2018 fight -- his last loss -- and now he wants to run it back with Stylebender, promising a different result.

"I'm not gonna discredit Izzy. He did a great job in the first fight. But, after looking at the fights, my coaches were like, 'Are you okay? What's wrong? Cause that ain't you,'" 37-year-old Brunson tells TMZ Sports.

Derek says he couldn't train for 2 weeks before the Adesanya fight ... as he was dealing with a hurricane that disrupted his routine. The time away from the mats made DB rusty.

Brunson also says he stopped lifting weights in the lead-up to the fight ... in an effort to increase his cardio. However, Derek says the strategy backfired in the fight.

Bottom line, Israel won, but Brunson says that won't be the case next time.

Since takin' the L, Brunson's been on a rampage -- winning his last 5 fights -- with dubs over Edmen Shahbazyan (his 1st loss), Kevin Holland and Darren Till, in addition to 2 others.

Adesanya's likely going to fight Robert Whittaker later this year or the beginning of next year.

Tom Brady's retirement will mark the end of TWO Hall of Fame careers ... so says Chris Gronkowski, who tells TMZ Sports his bro, Rob Gronkowski, will officially quit when the QB does.

"Whatever Tom has left," Chris says, "I think that's what Rob has left as well."

As for why ... Chris says it's simple -- he just can't fathom Rob sticking around and catching passes from a different style of signal-caller.

"I just can't see him playing with another quarterback," Chris tells us. "It's tough to get that chemistry. It's tough to win once you lose that QB."

Tom has said his goal is to play until he's 45 years old and then reevaluate things ... which means he's looking to strap up the pads through at least the 2022 season.

And, at 32 years old, that wouldn't seem too farfetched for Gronk ... but, remember, the tight end has dealt with plenty of injuries in his career -- including "probably" 20 concussions.

But, Rob looked healthy as ever in the Bucs' season-opening win over the Cowboys on Thursday ... and Chris tells us he could see Rob's career continue if Tom decides he wants to play another FIVE years.

"I think Rob will play it out until Tom plays it out is what I'm thinking," Chris says.

Rayshard Brooks' widow wants someone to pay for his shooting death ... so she's suing the City of Atlanta and the 2 police officers involved in the incident that killed him.

Tomika Miller just filed a lawsuit on behalf of Rayshard's estate ... claiming her late husband's shooting death in a Wendy's parking lot on June 12, 2020, was "senseless and unjustified."

According to the lawsuit, obtained by TMZ, Tomika claims Rayshard remained "calm, polite, cordial and cooperative" with cops during a 41-minute interaction until officer Garrett Rolfe began handcuffing Brooks to arrest him and threw him to the ground.

In the suit, Tomika claims the other cop, Devin Brosnan, then threatened Rayshard with a Taser while he was on the ground ... even though she claims Brosnan had not completed the police department's mandatory Taser certification course.

Tomika claims Rayshard stood up while being threatened and gained control of Brosnan's Taser ... and that's when Rolfe grabbed his own Taser and shot Rayshard with the Taser darts.

In the docs, Tomika claims Rayshard turned his back on the cops and started running away after being tased, with Rolfe chasing after him and firing 3 bullets from his gun, 2 of which struck Brooks in the back and caused him to crumple to the ground.

Tomika claims the cops didn't give Rayshard medical aid after shooting him, and instead, Rolfe went over and kicked Brooks.

In her suit, Tomika claims Rolfe acted with actual malice and an intent to injure Rayshard by using deadly and excessive force.

Rayshard's widow claims the officers acted with deliberate indifference by not rendering medical aid after shooting him.

Jo Koy has a future in politics, 'cause dude showcased some serious sidestepping skills when we asked about Chelsea Handler ... his new GF. Or is she???

The comedian joined us Friday on "TMZ Live," and we talked about his big night at Dodger Stadium. Jo recently got the call to throw out the first pitch, and we -- like everyone else watching -- couldn't help but notice how cozy he and Chelsea were on the field.

Look, she was coaching Jo, and they had no problem hugging up on each other in front of a 56,000 seat stadium -- hell, they even posted pics together that screamed date night. So, we had to ask about the budding romance.

Well, Jo's trying (keyword: trying) to have y'all believe he and Chelsea are just "great friends."

That being said ... Jo -- host of the new Netflix competition show "Metal Shop Masters" -- couldn't stop paying Chelsea compliments. He also called her beautiful, and came THIS close to buckling under pressure ... but dude kept it together.

Jo didn't even fall for the ol' slip-the-dating-question-into-the-middle-of-a-plug-for-his new show tactic!!!

For what it's worth, Chelsea held a Q&A on Instagram just days after the Dodgers game date, and when asked if she has regrets for not getting married/having kids, Chelsea answered she's "never felt more confident and secure in my life decision-making skills, in remaining childless and alone, than I have during this pandemic."

Of course, we weren't talking marriage or kids ... just dating. Still, no solid confirmation, but watch the vid -- you can read between the lines.

Kate Beckinsale has been rushed to the hospital in Las Vegas.

Sources connected to Kate tell TMZ ... the 'Underworld' star has been staying at The Signature at MGM Grand while in town to shoot the film, "Prisoner's Daughter." We're told around 10:30 AM Friday morning, her back went out and it was bad enough that she was rushed to a nearby hospital by ambulance.

We're told at the time of this posting Kate is still in the ER. Her condition is unclear ... we're told this is all happening in real-time.

Kate posted a photo on social media Thursday from Vegas ... we're told she's been there about a week shooting the movie.

Beckinsale became a Hollywood starlet in the late '90s after starring in "Brokedown Palace," but really broke out the next couple years with roles in "Pearl Harbor" and "Serendipity."

She went on to star in "Van Helsing" and landed a leading lady role soon after with the 'Underworld' franchise.

Former WWE star Al Snow is being hailed as a hero ... after the wrestling legend saved a child's life Thursday by jumping in the ocean and pulling the boy from a riptide.

The incredible act of bravery all went down at Santa Rosa Beach in Destin, Fla. ... when Snow -- who gained fame in the 1990s for carrying and talking to a mannequin head named "Head" during matches -- says he heard yelling and screaming while he was in the water.

Snow says when he looked around, he saw a boy being hit by waves while being pulled away by a rough current.

58-year-old Snow says a lifeguard was on the beach ... but added, "I knew she wasn't going to make it in time" -- so he sprung into action.

"I made it, thank God," Snow said. "And, I caught him just by the arm just as a wave started to pull him even further out. If I hadn't have grabbed him, I think he'd have probably went out to sea."

"That would have been it."

Snow, though, says the rescue mission nearly turned dire after he snagged the child ... 'cause a wave took them under -- and it caused him to remember Shad Gaspard, the wrestling star who tragically died in the Pacific Ocean in May 2020.

"I was able to stay up," Snow said, "and hand him off to the lifeguard and I made my way back across to my friend and we went up on the beach and I felt like I was about to collapse. I was exhausted."

Snow said neither he nor the boy suffered injuries ... and added the child's mom cried and thanked him repeatedly afterward.

And, in a lighthearted moment, after everyone was safe and sound, Snow says a couple on the beach actually recognized him from his wrestling days!!

Jason "Mayhem" Miller, troubled ex-MMA fighter, was arrested for felony domestic violence in L.A. ... after allegedly getting physical with a woman, TMZ Sports has learned.

40-year-old Miller was taken to jail ... and his bail has been set at a whopping $1.385 million.

He is still currently in custody.

Our law enforcement sources tell us cops in the San Fernando Valley received an emergency call before 3 AM Friday morning ... made by a female who was screaming on the phone.

Police -- lights and sirens blaring -- raced to the scene code 3 ... and found the female caller with visible marks on her face and neck.

At that point, cops *attempted* to arrest Miller inside the home ... but, he didn't cooperate.

A struggle ensued, and LAPD tased him.

Finally, police were able to cuff Miller ... and he was taken to the hospital to be checked out by doctors.

Miller was ultimately booked for felony domestic violence.

It's not the first time Mayhem's lived up to his name ... he's got a (very long) rap sheet.

In 2011, Miller was arrested for allegedly putting his sister in a headlock ... and refusing to release her.

Then in 2012, he was arrested for allegedly going into a church and spraying a fire extinguisher, before getting buck naked.

In 2015, Jason was locked up for allegedly trying to use a ceramic tile as a weapon against cops ... before being tased and arrested.

R. Kelly's getting loud support outside his sex crimes trial, and federal prosecutors look like they're getting ready for a dance routine ... thanks to one obnoxious fan with great timing.

This video, shot Friday morning outside the federal courthouse in Brooklyn, is classic. Normally, a team of Assistant U.S. Attorneys arriving to wrap up the 4th week of Kelly's trial would be super boring. But, throw a little "Step in the Name of Love" over it and, well ... check it out.

No, prosecutors didn't bring their own entrance music -- there was a fan by the front door of the courthouse blaring Kelly's tunes off his phone. And yes, the prank is probably in poor taste, considering the charges the disgraced singer's facing.

Still, the timing of the attorneys is uncanny ... they really do seem to be stepping on the beat, almost as if a lawyer flash mob's about to break out.

Eventually, we're told a U.S. Marshall came outside and asked the fan to turn it down, but the prosecutors had already gone inside to do their day jobs.

Cesar Millan is in the throes of a lawsuit over his pit bull severely biting a promising gymnast, who alleged this dog not only has a history of extreme violence, it allegedly attacked and killed Queen Latifah's dog and he then, according to the lawsuit, tried to cover it up.

Lidia Matiss claims in 2017, she went to her mom's office building in Van Nuys, CA, a building she says is owned by Cesar. Lidia says she was visiting her mom, who worked for Cesar.

She says she encountered Cesar's pit bull, Junior, who was roaming the halls unsupervised and unleashed. She says the dog attacked her, repeatedly biting her on the legs, including her left calf. She went to the ER and it became apparent ... her injures were severe.

The lawsuit says Lidia was a "star gymnast" who performed at a Level 10 ... the highest level in the USA Gymnastics Junior Olympics Programs. She says she was being actively recruited by the University of Pennsylvania, but everything changed with the dog bite. She could no longer compete due to the extreme pain she was enduring.

Lidia -- repped by attorneys Omar G. Qureshi and Brian M. Adesman -- says Cesar knew Junior had a history of violence yet regularly allowed the dog to roam free. She says the dog had bitten several people and mauled several dogs, including one dog owned by Queen Latifah.

According to the lawsuit, Queen Latifah brought 2 of her dogs to Cesar's Dog Psychology Center in Santa Clarita, CA. She says Junior mauled one of her dogs to death, and Lidia claims Cesar covered it up by telling his staff to tell Queen Latifah the dog was hit and killed by a car.

Cesar filed an answer to the lawsuit, claiming, among other things, Lidia assumed the risk of being bitten because she knew of the danger. He also claims Lidia herself was negligent, although he doesn't say how.

Lidia says the bite left her impaired ... wounded, disfigured and she continues to suffer physical and emotional pain. She's suing for unspecified damages.

Britney Spears wants to end her conservatorship ASAP, but she doesn't want to let go of her personal conservator ... TMZ has learned.

Multiple sources with direct knowledge tell TMZ ... Britney wants Jodi Montgomery to stay on her payroll indefinitely ... beyond the life of the conservatorship, which could -- repeat -- could end soon.

Our sources say Britney has told multiple people in her camp she has already asked Jodi to stay on ... performing various tasks including dealing with her doctors, making various appointments, making sure she takes the right regimen of meds, arranging meals and chefs, handling the house staff, organizing recreational outings, etc.

We're told Britney has assured people in her camp Jodi has agreed to stay on even if the conservatorship terminates.

What's interesting ... so far Britney and co. have not filed legal docs asking to end the conservatorship. As we reported, her lawyer, Matt Rosengart, has said this is a 2-step process ... getting Jamie out of the conservatorship first, and then putting the conservatorship itself in the crosshairs.