Elon Musk Zuck Refused Fight At Colosseum!!!

Elon Musk says he isn't the one holding up a battle of the billionaires with Mark Zuckerberg ... claiming Tuesday the Meta honcho is actually the one who turned down a potential fight at Italy's Colosseum.

The Tesla exec took to X just minutes ago to explain his side of the situation ... saying after the two men had initially agreed to fight, Rome offered up one of the Seven Wonders of the World for the guys to scrap in.

But, according to Elon, Zuck just flat-out didn't want to do it.

"Zuck declined," Musk said emphatically.

That's when he said he offered to fight in Zuckerberg's backyard Octagon instead.

"I suggested his home as 'safe space,'" Musk said. "Tragically, he was ahem 'traveling.'"

Zuck, meanwhile, has offered up a completely different version of the situation, saying on Threads earlier this week that he was moving on from the battle ... because he didn't believe Musk was serious at all about the fight.

"I offered a real date," the 39-year-old said. "Dana White offered to make this a legit competition for charity. Elon won't confirm a date, then says he needs surgery, and now asks to do a practice round in my backyard instead."

He continued, "If Elon ever gets serious about a real date and official event, he knows how to reach me. Otherwise, time to move on. I'm going to focus on competing with people who take the sport seriously."

It seems what could be next for Zuckerberg now is a fight in the UFC -- as he's appeared to indicate he wants a match with a real MMA fighter ... something White seems more than willing to put on.

Tuohy Family Oher Attempted $15 Million Shakedown ... Before Blasting Us In Court Docs!!!

The Tuohy family says before Michael Oher made "outlandish," "hurtful" and "absurd" claims about them in court on Monday ... he actually tried to shake them down for $15 MILLION.

Marty Singer -- the Tuohy family attorney -- said it all happened recently ... and, what's worse, he claimed this is not the first time Oher has done this.

Singer -- in a lengthy statement to TMZ Sports -- said Oher came to the Tuohys prior to filing his 14-page petition in Shelby County, Tenn. ... and threatened them, saying if they didn't pony up an eight-figure check, he'd "plant a negative story about them in the press."

Singer denied all of the allegations in Oher's court filing ... explaining that Sean and Leigh Anne Tuohy absolutely did not trick the former NFL star into getting into a conservatorship when he was 18 years old as he had claimed.

The conservatorship "was established to assist with Mr. Oher’s needs, ranging from getting him health insurance and obtaining a driver’s license to helping with college admissions," Singer said. "Should Mr. Oher wish to terminate the conservatorship, either now or at anytime in the future, the Tuohys will never oppose it in any way."

As for Oher's claims that the Tuohys used the conservatorship to broker a movie deal with Fox behind Oher's back that netted them millions -- while leaving Oher with nothing -- Singer said that was BS as well.

"The notion that a couple worth hundreds of millions of dollars would connive to withhold a few thousand dollars in profit participation payments from anyone -- let alone from someone they loved as a son -- defies belief," Singer said.

Instead, the attorney claimed Tuesday the Tuohys had "received a small advance from the production company and a tiny percentage of net profits" from "The Blind Side" ... money Singer said the Tuohys have always either shared with Oher or have tried to share with the former Baltimore Ravens tackle.

"Over the years, the Tuohys have given Mr. Oher an equal cut of every penny received from 'The Blind Side,'" Singer said. "Even recently, when Mr. Oher started to threaten them about what he would do unless they paid him an eight-figure windfall, and, as part of that shakedown effort refused to cash the small profit checks from the Tuohys, they still deposited Mr. Oher’s equal share into a trust account they set up for his son."

Singer continued, "Unbeknownst to the public, Mr. Oher has actually attempted to run this play several times before – but it seems that numerous other lawyers stopped representing him once they saw the evidence and learned the truth. Sadly, Mr. Oher has finally found a willing enabler and filed this ludicrous lawsuit as a cynical attempt to drum up attention in the middle of his latest book tour."

Singer added the Tuohys are "heartbroken" over it all and they hope to reconcile with Oher soon ... though "they will not hesitate to defend their good names, stand up to this shakedown and defeat this offensive lawsuit."

We covered it all in the latest episode of The TMZ Podcast, available on all podcast platforms.

Alex Collins Crash, 911 Audio Driver 'Hysterical' After Wreck ... 'I Can't Find Him!!!'

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PANICKED CALLER

The woman involved in the car crash that killed Alex Collins on Sunday night was "hysterical" after the wreck ... telling cops she did not realize the force of the collision had sent the former NFL star into her vehicle.

"I can't find him!" she can be heard saying in the 911 audio, obtained by TMZ Sports.

The call was placed just a few minutes after Collins' motorcycle had collided with the woman's SUV at around 10:20 PM in Lauderdale Lakes, Fla.

The woman told dispatch that Collins had "hit me from behind" ... though she was frantic -- because she had no idea where his body had gone after the crash had occurred.

"I'm trying to look to see where he is," she said.

Minutes later, bystanders can be heard in the background of the call telling her Collins was in her car -- screaming at her to open the vehicle's door ASAP.

As we reported, authorities eventually pronounced Collins dead at the scene. He was just 28 years old.

The NFL community mourned his passing on Monday ... with his former teammates Russell Wilson, Geno Smith and Robert Griffin III all honoring him with tribute posts on their social media pages.

Others around the league -- including Tyler Lockett, Jimmy Graham and Marlon Humphrey -- sent their condolences as well.

"Always quick to greet everyone with a smile, he was a genuinely kind person who carried a special joy and passion wherever he went," said Collins' former team, the Baltimore Ravens. "May Alex always be remembered for the light and love he brought to so many people in his life."

RIP

Surfer Kai Lenny Critical Of Government Response In Maui ... Leading Citizen Recovery Effort

Pro surfer Kai Lenny has stepped up in a major way after wildfires devastated Maui ... something he says he was forced to do after help from federal and local government never came.

"For some of us, we were kind of sitting back, waiting for help to arrive, but nothing was happening. We were sort of in shock," the 30-year-old Maui resident told CBS News.

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WE NEED YOUR HELP

Lenny, born and raised in Hawaii (Paia, Maui County), says he began receiving requests for assistance and knew he had to help.

"When I started getting texts and messages from friends on the other side saying, 'Hey, no one is here. Do you know anyone you can call? Can you help us?'"

That's when Kai and other locals started collecting resources, including jet skis and charter planes to transport supplies like clothing, medicine, and food.

Inexplicably, Lenny says the government initially intervened, blocking the airplane from transporting medicine like Insulin ... before ultimately relenting and approving the delivery.

As for the Federal Emergency Management Agency (FEMA), the organization says they have 300 people on the ground in Maui. The Red Cross also says they have 250 disaster workers in the area, too.

Despite what FEMA claims, Kai says he hasn't personally seen a government presence.

"I haven't seen one state, one county, one federal official at any one of the donation hubs where people are most suffering."

The death toll has already reached 99 people, but there are fears it will rise sharply in the coming days, as many people are still missing. Over one thousand structures have also burned to the ground, and the community is shaken.

"At one moment you're in beautiful Hawaii, and it's just another great day, and the next, this amazing tragedy occurs, and it's so violent, I don't know what to do. I haven't prepared for a whole town going up in flames."

Sandra Bullock Twitter Wants Her 'Blind Side' Oscar Pulled ... After Oher Controversy

Twitter is home to a lot of ridiculous opinions, but the latest trend involving Sandra Bullock might be the app's worst ... users are calling for her to lose her Oscar on the heels of "The Blind Side" controversy.

It's about as crazy as it sounds, especially since there's zero evidence Bullock -- who played Leigh Anne Tuohy in the movie -- had any clue of the drama behind the scenes with Michael Oher and the Tuohy family.

One user wrote, "So Sandra Bullock should have to give back her Oscar right, and man do we need to start checking these good feeling stories. The parents blocked $300 in earnings the movie from him getting any of it and gave the money to their real children? WOOOOOOOW!"

Another says, "If the Michael Oher allegations are true then we have to go AND TAKE THE OSCAR back from Sandra Bullock and give it to Gabourey Sidibe for 'Precious'" and "Sandra Bullock should give her Oscar back. She knows she didn't deserve that s***."

However, there's also people coming to her defense, writing, "Not y'all calling for Sandra Bullock's Oscar to be revoked. It ain't her fault the real life people were exploitative scammers and thieves," and "You know Sandra Bullock deserved her Oscar because she acted so well, she made the Tuohy family likeable."

As we reported, the former NFL star claims the Tuohy family never adopted him -- as the movie suggests -- but he was instead placed under a conservatorship. Oher claims the family made a ton of cash off his life story in "The Blind Side," while he got nothing.

Sean Tuohy is calling BS on Oher, saying the family's only option to legally make him part of their family was a conservatorship -- as he was over 18 -- and each family member made about $14,000 from the movie ... including Oher.

We covered it all on the latest episode of The TMZ Podcast, available on all podcast platforms.

Russell Wilson Mourns Alex Collins' Death ... 'Keep Dancin' In Heaven'

Russell Wilson was absolutely devastated to learn of Alex Collins' passing this week ... saying the man who he shared a backfield with for several years in Seattle was "one of my favorite teammates."

"You brought joy to every huddle," Wilson wrote on his X page. "Love you AC. Forever missed. #RIP"

Collins was killed on Sunday night in Lauderdale Lakes, Fla. ... after authorities said his motorcycle collided with an SUV at around 10:20 p.m.

Wilson put up his tribute post to his good friend less than 24 hours after the accident ... saying he hoped the former tailback -- who was known for Irish jig celebrations -- would "Keep Dancin’ in Heaven."

Others in the football world shared their condolences following Collins' passing as well ... including his former teammate Geno Smith, who wrote on X, "Life so crazy man."

"Fly high my boy," he added, "until we meet again. AK ALL THE WAY."

One of Collins' other ex-teammates, Robert Griffin III, shared an emotional tribute as well ... remembering a fun night on the town he had with the running back several years ago.

"Everyone was excited to see him, laughing when he came around and showing him love," RGIII said. "You see everyone loved this man and his energy was contagious. To end the night, he hit this dance with all the fans watching him on the dance floor. WHAT A NIGHT and WHAT A GUY AC WAS."

"Shared more laughs than people know and I’m blessed to have been your teammate my brother. Rest In Peace."

NFL stars Rashaad Penny, Tyler Lockett, Marlon Humphrey and Jimmy Graham penned tributes to Collins on Monday too.

Collins -- who played five seasons in the NFL, starting 29 games for the Seahawks and Ravens -- was just 28 years old.

Rest in peace.

Pro Baseball Game Insane Backflip Catch In Center ... Bananas!!!

This may be one of the greatest catches you'll ever see in a baseball game -- albeit, totally unnecessary -- but still, amazing!

It all went down during the Savannah Bananas -- an exhibition baseball team known for their crazy and fun on-field antics -- world tour in Hartford, CT on Monday night.

The Bananas were taking on the Party Animals, who were at the plate in the 2nd inning. With the count 3 and 1, an Animals player hit a routine pop-up to center field.

But, the catch was anything but routine.

Centerfielder DR Meadows settled under the ball, but instead of simply making the easy out, Meadows busted out a backflip that'd make Simone Biles blush, catching the ball in the same motion, landing with the ball in his glove.

The Savanah Bananas are the most fun team in baseball ... and the catch is just the latest example. There was the bat on fire. Or, the hit by pitch. The in-field dance routine, and the list goes on and on.

Not quite Willie Mays, but an amazing catch! ⚾

Little League World Series Permanently Removing Bunk Beds ... After Player's Injury

Bunk beds at the Little League World Series are out for good ... the tandem sleeping units will be permanently removed from the prestigious event going forward after a player was seriously injured in one of them last year.

Little League officials said in a statement to the Associated Press on Monday ... the decision was made after Easton Oliverson suffered a fractured skull and brain bleed while falling from a top bunk inside the LLWS' dormitory complex in Williamsport, Penn. in 2022.

"Out of an abundance of caution," the officials said, "we placed all beds individually on the floor during last year’s World Series, and in preparation for the 2023 Little League International Tournament, Little League decided to provide its participants with single, one-level beds for all of their player housing at each of its tournament locations, including those in Williamsport, Pennsylvania, where the dormitories can accommodate all 14 single beds."

This year's version of the event is slated to begin later this week.

As we previously reported, Oliverson nearly died following a fall at last year's LLWS ... with his family saying the 12-year-old tumbled from a top bunk to the floor while he was asleep.

Oliverson was rushed to the hospital for emergency surgery ... but, thankfully, he survived.

The player's family went on to sue Little League Baseball over the fall, alleging the beds were not safe. Little League officials never publicly commented on the allegations in the suit.

As for Oliverson, in the family's latest update on his condition back in November, they said he's still making strides in his recovery, though the journey back to 100 percent was not finished yet.

Alex Collins Crash Scene Shows Mangled Motorbike ... Destroyed SUV

Images from the Alex Collins crash scene are horrifying ... showing the ex-NFL running back's motorcycle and the SUV that it ran into were completely mangled following the collision.

The former Baltimore Ravens star was killed in the accident on Sunday night ... after authorities say his 2004 Suzuki GSX-R600K bike collided with the side of a 2002 Chevrolet Suburban that had appeared to turn in front of him on a busy road in Lauderdale Lakes, Fla. at around 10:20 PM.

According to the Broward County Sheriff's Office, the wreck was so violent, Collins was thrown from his motorcycle ... and later pronounced dead on the scene.

Video shot just moments after the impact shows both vehicles were completely destroyed ... with Collins' bike left in pieces in the middle of the street.

Officials say the circumstances surrounding the crash are still under investigation ... though they added the driver of the SUV did remain on scene and was cooperative.

Collins was picked by the Seahawks in the fifth round of the 2016 NFL Draft ... and went on to have a solid career for both Seattle and Baltimore. In his five seasons with the two teams, he piled up 1,997 rushing yards and 18 rushing TDs. He added 467 receiving yards on 59 catches as well.

After leaving the NFL following the 2021 season, Collins attempted to resurrect his football career in the USFL -- signing with the Memphis Showboats earlier this year.

He was just 28 years old.

RIP.

Mark Zuckerberg Signs Now Point to MMA Match with UFC Fighter

Mark Zuckerberg is hellbent on taking a fight in the UFC -- NOT with Elon Musk, but possibly with an actual UFC fighter -- and now, Dana White is more than insinuating it could actually go down!

As you know, Zuck's moved on from a fight with Elon, saying last Friday, " ... I'll share details on my next fight when I'm ready." So, he's got some plan for his "next fight."

He went on to say, "I want to do it in a way that puts a spotlight on the elite athletes at the top of their game," adding, "You do that by working with professional orgs like the UFC or ONE to pull this off well."

Zuck said Monday, "I'm going to focus on competing with people who take the sport seriously."

So, who are the "elite athletes" and "people who take the sport seriously?" It seems unlikely there's another Elon out there -- billionaire vs. billionaire -- and it doesn't make a lot of sense Zuck would involve the UFC for some amateur fight with a rando.

We know Zuck's been in communication with UFC Prez Dana White for well over a month and probably a lot longer, and Dana has 500 fighters on his roster who would love this kind of attention -- fighting M.Z.

Now there's no way Zuck would fight a UFC vet, but what about a fighter who just joined the org?

We contacted Dana with our connect-the-dots theory, and here's what he told us ... "I have said since day 1 Mark is a very serious guy. He loves the sport and is training hard. I believe he is serious about fighting in the UFC."

Notice Dana said "fighting IN the UFC." That more than suggests he'd be fighting someone on the INside, not the outside.

So, stay tuned!!!

Kim Zolciak & Kroy Biermann Money Troubles Straining Marriage ... Still Want It to Work

Kim Zolciak and Kroy Biermann's marriage is one big rollercoaster ride -- we're told their ongoing money struggles are still taking a toll, making for some pretty bad days as they attempt to stay together.

Sources close to the couple tell TMZ ... Kim and Kroy's steep financial troubles -- which they still won't publicly address -- are putting a lot of pressure on them. We're told they'll be fine one day, and then at each other's throats the next.

Our sources also say there's an equal amount of blame being thrown around their household -- you'll recall, they allegedly owe $1M to the IRS, and they've been sued by companies like Target and BMW for being behind on payments.

We're told there's still a lot of finger-pointing going on, even though they withdrew the divorce.

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As for their 4 kids, we're told they're seeing everything going down ... especially because a lot of their recent blowups have been happening inside their home.

However, our sources say Kim and Kroy do want their marriage to work, and they're trying their best to keep it alive amid their ongoing drama.

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IN TEARS WITH COPS

As we reported, the "Real Housewives" alum and the former NFL player called off their divorce in July, weeks after the initial filing. Of course, police body cam footage from a May incident revealed a ton of drama going down between them -- and we were told the footage sparked some anger between them when it was released.

Alex Collins Former Ravens RB Dead at 28 After Motorcycle Accident

UPDATE

7:30 PM PT -- Alex Collins was involved in a fatal motorcycle accident in Florida around 10:20 PM Sunday night, according to the Broward County Sheriff's Office Traffic Homicide Unit.

UPDATE

BSO says Collins was riding a 2004 Suzuki GSX-600K in Lauderdale Lakes when the accident occurred.

UPDATE

Broward County says the investigation is still ongoing, but the information they've gathered thus far indicates a woman driving a Chevrolet Suburban made a turn, crossing over the lane Collins was traveling in, causing him to strike the rear passenger side of the SUV.

UPDATE

Emergency responders rushed to the location, but Alex was pronounced dead on the scene.

UPDATE

Law enforcement says the woman remained on the scene and is cooperating with authorities ... who are still investigating the crash.

Alex Collins, a running back who played five seasons in the National Football League, is dead.

The Baltimore Ravens, one of Alex's former NFL teams, announced his death Monday ... it's unclear when he died, ditto for the cause of death.

Alex had his two best NFL seasons with the Ravens in 2017 and 2018, and the team is remembering him "for the light and love he brought to so many people in his life."

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LAST TIME WE SAW HIM
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The Ravens say Alex was "quick to greet everyone with a smile, a genuinely kind person who carried a special joy and passion wherever he went."

The Seattle Seahawks, the team that selected Alex in the 2016 NFL Draft out of Arkansas, says the franchise is "absolutely heartbroken" by his death.

Alex had two stints with the Seahawks ... he played with Seattle as a rookie in 2016 and then returned to the club for the 2020 and 2021 NFL seasons.

Overall, Alex played in 50 NFL games ... racking up 1,997 rushing yards, 467 receiving yards and 19 total touchdowns.

Alex was out of pro football altogether in 2022 before signing this year with the Memphis Showboats of the United States Football League, ending the season on injured reserve.

He was 28.

RIP

Sean Tuohy Oher Claims Are 'Insulting' ... We Made Little Money Off 'Blind Side'

Sean Tuohy is firing back at Michael Oher ... calling BS on all of the former NFL star's "insulting" allegations -- while insisting he and his family made little money off of the success of "The Blind Side."

The 63-year-old -- who was played by Tim McGraw in the 2009 hit movie -- said he was "devastated" to learn that Oher had accused him and his wife, Leigh Anne, of exploiting him for fame and money in a court filing in Tennessee on Monday morning.

Tuohy told the Daily Memphian he never tricked Oher into getting into a conservatorship ... and he certainly didn't make millions off of it either.

Instead, Tuohy said the whole ordeal went down because the NCAA told him if Oher wanted to attend Ole Miss -- he'd have to be considered part of the family due to Touhy's status as a "booster" at the school.

"I sat Michael down and told him, 'If you're planning to go to Ole Miss -- or even considering Ole Miss -- we think you have to be part of the family,'" Tuohy said. "'This would do that, legally.'"

He continued, "We contacted lawyers who had told us that we couldn't adopt over the age of 18; the only thing we could do was to have a conservatorship. We were so concerned it was on the up-and-up that we made sure the biological mother came to court."

Tuohy then said he'd "of course" end the conservatorship if that's what Oher wanted.

As for the allegations that Tuohy used the conservatorship to negotiate a big movie deal with Fox that netted massive profits for him and his family ... Tuohy said that just simply never happened.

"We didn’t make any money off the movie," Tuohy said. "Well, Michael Lewis ['The Blind Side' book author] gave us half of his share. Everybody in the family got an equal share, including Michael. It was about $14,000, each."

Tuohy says he was in no need of cash after he had sold his fast-food franchises for over $200 million.

"I will say it’s upsetting that people would think I would want to make money off any of my children," he said.

Tuohy also told the outlet his family and Oher had remained very close in the years after the release of "The Blind Side" ... though he began to notice a schism forming about a year and a half ago.

"No question, the allegations are insulting," he said, "but, look, it's a crazy world. You've got to live in it. It's obviously upset everybody."

Ezekiel Elliott Signing With Patriots ... Wearing No. 15

Ezekiel Elliott's got a new home and a new number ... the former Dallas Cowboys star said Monday he's signing with New England -- and he'll wear No. 15 when he gets there!!

Elliott announced the move on his X page just minutes ago ... writing, "One Five, all the way live ! @Patriots."

Adam Schefter reports Zeke's getting a 1-year deal with his new team that could be worth up to $6 million.

The tailback had been one of the best runners in the league after Dallas took him with the No. 4 overall pick in the 2016 NFL Draft -- leading the NFL in rushing yards twice and earning three Pro Bowl selections.

His production, though, waned over the past couple years ... and following Tony Pollard's emergence as a lead back in the 2022 season -- the Cowboys parted ways with Elliott this past offseason.

But the 28-year-old seems very open to the new start -- he even revealed Monday he's going back to the short hairdo he rocked during his rookie year in Dallas for the occasion.

Waiting for your permission to load the Instagram Media.

Get ready, Pats fans ... a 1-2 punch of Zeke and Rhamondre Stevenson is coming!!

'Blind Side' Inspo Michael Oher The Tuohys Never Adopted Me ... It Was A Conservatorship

Shocking allegations from Michael Oher ... the former offensive lineman says the family who took him in, helped him become an NFL star and was later portrayed in the hit movie "The Blind Side," lied to him, never adopted him and screwed him out of potentially millions of dollars.

The ex-Baltimore Ravens tackle spelled out the eyebrow-raising claims in a petition filed in Shelby County, Tenn. on Monday ... alleging Sean and Leigh Anne Tuohy "exploited" him "for their own benefit" after realizing he was a "gullible young man" with athletic talent.

Oher says he initially got involved with the Tuohys during the summer following his junior year of high school ... after he claimed "a broken social system" in Tennessee left him homeless and in need of aid.

In the docs, Oher says the couple invited him to stay in their home often during that summer to help him out, and took him on shopping trips where they'd buy him clothes. Eventually, before his senior year started, he says they asked him to move in with them.

"The Tuohys did tell Michael they loved him and that they intended to legally adopt him," Oher said in the documents. "Michael believed them, was delighted to be part of a real and stable family, and trusted Mr. and Mrs. Tuohy completely."

A short time later, however, Oher says the Tuohys pulled one over on him.

In the docs, the former football player -- who's now 37 years old -- claims the Tuohys presented him with legal papers that he believed were needed to begin the process of the family adopting him. Instead, however, he says he just learned in February 2023 that they were actually a petition to appoint them as his conservators -- a filing that would allow the Tuohys to "have total control over Michael Oher's ability to negotiate for or enter any contract, despite the fact he was over 18 years of age and had no diagnosed physical or psychological disabilities."

Oher claims the conservatorship then allowed the Tuohys to negotiate a deal with Fox for "The Blind Side," the '09 flick based on Oher's life.

Oher says the Tuohys got themselves and their kids -- but not him -- "a contract price of $225,0000 plus 2.5% of all future 'defined net proceeds.'" The movie -- in which Sandra Bullock won an Oscar for her portrayal of Leigh Anne Tuohy -- ended up grossing over $300 million.

Oher claims as part of the deal with Fox, a contract giving away the rights to his story without any form of payment whatsoever, was signed. Oher says he "at no time ever willingly or knowingly signed this document and that nobody" ever made him aware of what the document actually entailed.

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BAIT AND SWITCH
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Oher is asking for a judge to end the conservatorship. He's also asking for damages ... as well as an accounting of the money the Touhys made through contracts negotiated on his behalf. It all appears to be potentially a precursor to a lawsuit.

Oher -- who's previously been critical of "The Blind Side" over the way he feels he was wrongly portrayed as dumb -- played in the NFL from 2009 to 2016 ... starting 110 games in his career.

We covered it all on the latest episode of The TMZ Podcast, available on all podcast platforms.

Jimmy Fallon 'Sup, Yankee Stadium!!! Karaoke at Jonas Bros Show

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ROCKIN' WITH JIMMY

Jimmy Fallon gave Jonas Brothers fans quite the surprise at the band's latest show ... rocking the NYC crowd with a very impromptu karaoke performance.

The "Tonight Show" host jumped on stage at Yankee Stadium Sunday night, clearly a shock to folks in the crowd -- he showed up as the concert's intermission came to an end, showing off his boombox before jamming out to The Killers' "Mr. Brightside."

Sources with direct knowledge tell TMZ ... Nick Jonas asked Jimmy to show up at their NYC show a week ago -- he was told he could do whatever he wanted, and Jimmy tested the limits, asking if karaoke with his boombox would be alright.

Obviously, that was all good with the Jo Bros ... and we're told there was no rehearsal for the surprise appearance, but it looks like it was a moment fans will remember for a long time.

BTW, the Jonas Brothers are currently embarking on their "Five Albums. One Night" world tour, which features hits from 5 of their albums.

Far as we know, they're not bringing JF on tour!

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