McGregor Faces Surgery After 69-Second UFC 329 Nightmare

Conor McGregor's UFC 329 comeback was over before it barely began. Sixty-nine seconds into his fight with Max Holloway in Las Vegas, a knee injury forced the Irishman to signal the referee and walk away — but according to McGregor himself, he's far from done.

Gone in 69 Seconds

McGregor had been widely considered an underdog heading into the bout, and the fight ended almost as soon as it started. Attempting a jump kick in the opening moments, McGregor landed awkwardly and immediately knew something was wrong. He tried to push through for a few seconds before eventually waving off the contest — a brutal end to a night that had been years in the making.

The 37-year-old had carefully selected Holloway as his comeback opponent, and plenty of eyes — and money — were on the fight. The abrupt finish left the MMA world stunned.

Surgery, Rehab, and Going Again

Despite the gut-punch of an exit, McGregor wasted no time laying out his roadmap on Instagram. Surgery comes first, followed by rehabilitation, a return to martial arts training, and ultimately one more fight — which he described as the final bout on his current contract.

"All things work out for my good," McGregor posted. "Surgery. Prehab. Return to martial arts practice. Go again. Final fight of the contract. Please God!"

That's the kind of defiant energy McGregor built his brand on. Whether the body will cooperate is another question entirely.

ACL the Working Diagnosis

UFC president Dana White spoke candidly after the event, according to Sky Sports. His initial read on the injury was a blown ACL, and the medical staff on-site shared that assessment.

"Five years off in this sport is rough," White acknowledged, pointing to just how long McGregor had been away from active competition.

When asked whether a pre-existing injury could have played a role, White said there were zero red flags at Friday's ceremonial weigh-in — noting that McGregor had aggressively rushed Holloway during the face-off, a moment that racked up millions of social media views. If something had been wrong then, someone would have noticed.

Camp Says No Prior Injury

McGregor's manager John Kavanagh was equally direct on social media. He confirmed that the jump switch kick McGregor attempted was a staple of camp — drilled daily for months, run through multiple times in the warm-up without any issue. The knee simply gave way on the very first kick of the actual fight.

"Doesn't get any worse than this," Kavanagh wrote.

McGregor echoed that on X, insisting he had been landing kicks throughout training and even backstage before his walkout, with no warning signs whatsoever.

A Career Built on Comebacks — and Setbacks

This isn't the first time McGregor has had to chart a comeback from a serious injury. He broke his leg against Dustin Poirier in 2021 and spent years working his way back. A scheduled meeting with Michael Chandler in mid-2024 collapsed after a broken toe in training derailed preparations once again.

Off the canvas, life got even more complicated. A civil court in Ireland found him liable for the assault of a woman who accused him of rape in 2018. Then, in October 2025, he accepted an 18-month anti-doping ban tied to missed sample collection attempts — a ban that was backdated and expired in March, clearing the path for his UFC 329 appearance.

With so many observers questioning his chances even before the fight, the knee injury only deepens the uncertainty surrounding what comes next for one of combat sports' most polarising figures.

What's Next?

McGregor says surgery and rehab are the immediate priorities, with one final contracted fight waiting on the other side. At 37, with a battered body and years of ring rust, the road back won't be easy — but then again, it never has been for McGregor. He's been written off before.