What Happened to Conor McGregor? Knee Injury Ends UFC 329 Return in 69 Seconds

Updated July 12, 2026

Conor McGregor’s UFC return ended after just 69 seconds when he injured his right knee against Max Holloway at UFC 329. McGregor landed awkwardly after launching a flying left roundhouse kick, tried to continue, and was eventually stopped when he could no longer move safely on the leg.

Max Holloway was awarded the first-round TKO, taking McGregor’s professional record to 22-7. It was McGregor’s first fight since breaking his leg against Dustin Poirier at UFC 264 in July 2021.

How did Conor McGregor injure his knee?

McGregor opened the UFC 329 main event by rushing across the Octagon and throwing a jumping left kick. His right leg took the landing, and the knee appeared to buckle as his foot hit the canvas.

He attempted to throw more strikes, but his balance and movement quickly deteriorated. Holloway recognized the problem and repeatedly signalled to referee Mike Beltran that McGregor was hurt. The fight was waved off 1 minute and 9 seconds into the opening round.

The result was officially recorded as an injury stoppage, giving Holloway the TKO victory. It was an abrupt end to a rematch almost 13 years in the making and to McGregor’s first appearance in exactly five years and one day.

You can watch the incident through footage published by UFC on Paramount+ or the shorter report from ESPN MMA.

Did Conor McGregor tear his ACL?

There was no confirmed diagnosis immediately after the fight. UFC president Dana White told reporters that he and the promotion’s doctors were assuming McGregor had suffered an ACL injury, but that is a preliminary view rather than a published MRI result.

The ACL helps control rotation and forward movement of the shin relative to the thigh. A non-contact landing with the knee buckling can injure it, but video alone cannot show whether McGregor tore the ACL, damaged another ligament, injured the meniscus, or suffered a combination of problems.

Sports-medicine physician Brian Sutterer published a video analysis of the knee mechanism. It is useful context, but it should not be treated as McGregor’s official diagnosis. That will require examination and imaging from his medical team.

For now, the accurate description is a right-knee injury with a suspected ACL tear. Any reliable recovery timeline depends on what the scans reveal and whether surgery is required.

Was McGregor injured before the fight?

Pre-fight footage showing McGregor appearing to stumble while removing his shoes sparked speculation that he entered the Octagon compromised. There is no confirmed evidence that he did.

McGregor denied carrying an injury into the bout. In a post-fight statement, he said the problem “came out of nowhere” and described himself as being in a dark place after the loss. White also said there had been no visible sign of an injury at the ceremonial weigh-in.

The landing itself provides a clear moment when the right knee buckled. Until medical information says otherwise, claims that the injury was pre-existing remain speculation.

Conor McGregor injury timeline

This was not McGregor’s first major knee problem—or even his first against Holloway. His most significant reported injuries include:

August 2013: ACL tear against Max Holloway

McGregor tore the ACL in his left knee during his first UFC fight with Holloway. He adapted by wrestling more, won a unanimous decision, and then spent close to a year out before returning against Diego Brandão in July 2014.

2015: Knee injury before Chad Mendes

McGregor later said he tore “80 percent” of his ACL 14 weeks before facing Chad Mendes at UFC 189. That figure came from McGregor’s own account. He still competed and stopped Mendes in the second round to win the interim featherweight title.

2018: Foot injury before Khabib Nurmagomedov

After losing to Khabib Nurmagomedov at UFC 229, McGregor said he had injured his foot during camp and entered the fight with significant swelling. He chose to compete and lost by fourth-round submission.

July 2021: Broken leg against Dustin Poirier

McGregor fractured his lower left leg late in the first round of his trilogy fight with Dustin Poirier at UFC 264. The bout ended by doctor stoppage, and McGregor underwent surgery. He later said a titanium rod ran from below the knee toward the ankle.

The recovery and long absence that followed kept him out of competition for five years. For context on how uncommon an injury stoppage is within the wider result mix, see GrapplerHQ’s analysis of 8,591 UFC fights and finish trends.

June 2024: Broken toe cancels Michael Chandler fight

McGregor was scheduled to return against Michael Chandler at UFC 303, but withdrew after breaking the little toe on his left foot during training. The cancellation extended his time away from the Octagon.

July 2026: Right-knee injury against Max Holloway

McGregor’s long-awaited comeback ended on his opening attack at UFC 329. Unlike the left-knee injury from their 2013 meeting, the new injury affected his right knee.

What does the injury mean for McGregor’s future?

It is too early to put a reliable return date on McGregor’s calendar. The next step is a confirmed diagnosis. From there, treatment and recovery will depend on the exact structures involved, the severity of the damage and whether surgery is recommended.

The broader context is difficult to ignore. McGregor is 37, had just returned from a five-year layoff caused in large part by a serious leg fracture, and has now suffered another lower-body injury. Those facts make the diagnosis more consequential, but they do not by themselves prove his career is over.

McGregor’s own history also cuts both ways. He returned from the 2013 ACL tear to win UFC championships in two divisions, and he completed the original Holloway fight despite the injury. This time, however, the knee failed too early and too visibly for him to continue.

The fairest conclusion is also the least dramatic: McGregor’s next move cannot be judged until the medical results are known.

Videos of the McGregor knee injury and reaction

• UFC on Paramount+: Conor McGregor sustains right-knee injury — official broadcast footage of the sequence.
• ESPN MMA: McGregor injures his knee vs. Holloway — a concise news clip of the stoppage.
• Brian Sutterer MD: doctor explains the knee mechanism — an independent medical analysis, not an official diagnosis.
• UFC: Joe Rogan breaks down McGregor vs. Holloway 2 — post-fight discussion of the main event.

Frequently asked questions

What happened to Conor McGregor at UFC 329?

McGregor injured his right knee while landing from a jumping kick against Max Holloway. He could not continue safely, and the fight was stopped after 69 seconds.

Who won Conor vs. Max Holloway 2?

Max Holloway won by first-round TKO due to injury at 1:09 of Round 1.

Which knee did Conor injure?

McGregor injured his right knee at UFC 329. His ACL injury during the first Holloway fight in 2013 affected his left knee.

Has Conor torn his ACL?

An ACL tear was suspected immediately after UFC 329, but no scan-confirmed diagnosis had been made public when this article was updated.

When did Conor last fight before UFC 329?

His previous fight was a doctor-stoppage loss to Dustin Poirier at UFC 264 on July 10, 2021. McGregor broke his lower left leg late in the first round.

Sources

• Associated Press: McGregor suffers early knee injury at UFC 329
• UFC: UFC 329 official results and coverage
• UFC: McGregor’s return and injury background
• UFC: Conor McGregor through the years
• MMA Fighting: McGregor’s 2015 knee-injury account
• BBC Sport: McGregor’s 2024 broken toe

This article will be updated if McGregor, his team, the UFC or a treating physician releases a confirmed diagnosis.