Conor McGregor's five-year UFC comeback lasted 69 seconds and ended with a blown knee

Conor McGregor waited five years to walk back into the Octagon. He lasted 69 seconds.

The main event of UFC 329 at T-Mobile Arena in Las Vegas on Saturday night was supposed to be the rematch that fixed everything: McGregor, 37, back against Max Holloway, the man he beat on points way back in 2013. Instead McGregor opened with a jumping kick, landed badly on his right leg, and spent the next minute falling over. Referee Mike Beltran waved it off at 1:09 of round one. Holloway got a TKO win he spent the whole fight trying to refuse.

What actually happened

McGregor went for the flying kick almost immediately and came down wrong. He got up, tried it again, and hit the canvas again. After throwing a punch he went down a third time, then grabbed his right leg and stayed there, per TMZ, which reported UFC broadcaster Megan Olivi describing it on air as a "right internal knee injury."

Dana White was blunter at the postfight press conference.

"We're assuming blown ACL. I'm no doctor, but that's what I figured when I saw it, and the doctors think the same thing, too."

That is White's assumption, not a diagnosis, and no medical result has been released. theScore reported McGregor was seen limping out of the arena less than an hour later.

Holloway, for his part, sounded like a man who wanted no part of this ending. He told reporters he asked Beltran to stop it.

"I told the ref 'stop the fight, he doesn't want to fight. His demeanour isn't right.' He said 'fight' the first time. So I backed up and he stood up. He tried to do a hop step, then he did it again, and when he went back he grabbed his leg and screamed. I'm not trying to beat up a wounded dog."

He also, within about ten minutes, pitched the trilogy. "You guys are lucky, because there is gonna be a Holloway vs. McGregor 3 now," he said, per theScore. "Let's get this f-----g money." Asked whether a third fight would be a hard sell after that, Holloway said: "Not at all. You saw the numbers this thing was getting."

The "was he already hurt" theory, and the denial

Within an hour, people online were rewinding footage of McGregor arriving at the cage and stepping carefully out of his shoes, and deciding they had found the smoking gun. McGregor shot that down himself on X, in a post quoted by The Independent.

"My head gasket is gone. Destroyed. I had no injury / injuries going into the fight. I was throwing kicks, planted and jumping, all throughout camp as well as backstage before the fight. This came out of nowhere. I am beyond dark here. I can only describe it as hell."

White backed him up, and did it with a number only Dana White would reach for:

"The day of the press conference, he came running out of the back and ran right up [to Holloway] and stopped abruptly... Just on my accounts, the face-off has had 80 million views. So if there was a pre-existing [injury], somebody would have noticed it. Nobody noticed anything."

So: no evidence of a pre-fight injury beyond internet frame-by-frame, and both the fighter and the promoter saying there wasn't one. File it under theory, not fact.

The internet, being the internet

The fight world posted through it, and the split was roughly "genuinely sad" versus "genuinely delighted." theScore rounded up the reactions:

Brunson's number is his own guess, not a disclosed purse, and the UFC does not release McGregor's real money.

The context that makes this sting

This was McGregor's first fight since he snapped his left leg against Dustin Poirier at UFC 264 in July 2021, the longest layoff of his career. He is now on a three-fight losing streak and 1-4 in his last five, per theScore, with no win since he knocked out Donald Cerrone in January 2020. The Michael Chandler fight that was supposed to happen in June 2024 died when McGregor broke a toe in training.

Outside the cage, the past two years have gone no better. The Independent notes that an Irish civil jury found him liable for rape in 2024 over a 2018 incident, and that he accepted an 18-month anti-doping ban in October 2025 for missed testing "whereabouts failures," backdated and expired in March.

He came back for one night with a mohawk and a Wonderwall singalong, and left on one leg.