Conor McGregor’s return to the UFC lasted 69 seconds before a right knee injury stopped his fight with Max Holloway at UFC 329 on Saturday night at T-Mobile Arena in Las Vegas, ending what had been one of the most anticipated comebacks in combat sports history before it could begin in any meaningful sense.

McGregor had been away from the Octagon for five years following the broken leg he suffered against Dustin Poirier in their 2021 trilogy bout. In his absence, the sport moved on. The return against Holloway was meant to change that, but the night ended in familiar devastation.

McGregor attempted a running kick and slipped. He followed with a head kick, landed awkwardly, and Holloway pounced, landing a right hand while McGregor was briefly vulnerable. McGregor regained his feet but fell again. When he loaded up a kick with his right leg and the knee buckled entirely underneath him, Holloway gestured urgently to referee Mike Beltran, who stopped the fight at 1:09 of Round 1. The result was recorded as a first-round TKO victory for Holloway via injury.

Doctors suspect a torn ACL in McGregor’s right knee

McGregor posted twice on social media after the fight. The second statement addressed the reports that he appeared off during his ring walk.

“I was so sharp and so ready for this fight I cannot believe what has happened. The talk of me being off while walking in to the fight is nonsense. I was calm, ready, and confident. I am in shock what has taken place,” McGregor wrote. “The devil is literally staring at me right in front of my face here. I am not engaging. I will be at church tomorrow. I will overcome this. I will not be deterred. I will return.”

His earlier post read:

“My head gasket is gone. Destroyed. I had not injury / injuries going into the fight. I was throwing kicks, planting and jumping, all throughout camp as well as backstage before the fight. This came out of nowhere.”

UFC president Dana White said the initial medical assessment points to a torn ACL.

“We’re assuming it’s a blown ACL. I don’t think there was a pre-existing injury,” White told reporters. “The ceremonial weigh-in video had over 80 million views; someone would have noticed.” White called the finish “unbelievable” and said Thursday that the event had broken the promotional record for the biggest gate in UFC history.

Holloway, who avenged a 2013 decision loss to McGregor in their first meeting when Holloway was 21, attempted to address the audience but was largely drowned out. “Let’s give it up for Conor McGregor, guys. What an absolute animal,” Holloway said. “He was weak in the knees, I guess.” Holloway called for a trilogy.

McGregor entered at 22-6 overall and has gone 1-4 in his last five fights over ten years. He has one fight remaining on his UFC contract. A standard ACL recovery runs a minimum of four months, with a return to competitive fighting likely requiring additional time beyond that.