Gaming Conor McGregor’s Injury: What Happened To His Knee? By Brian Mazique ,
Forbes contributors publish independent expert analyses and insights. Brian Mazique has covered combat sports and video games since 2011. Follow Author Jul 12, 2026, 12:19am EDT Jul 12, 2026, 01:14am EDT --:-- / --:-- This voice experience is generated by AI. Learn more . This voice experience is generated by AI. Learn more . Summary Conor McGregor’s highly anticipated UFC return at UFC 329 in Las Vegas concluded abruptly after just 69 seconds against Max Holloway. McGregor sustained a significant knee injury in the opening moments, attempting a jumping kick that saw his knee visibly give out upon landing. Despite trying to continue, referee Mike Beltran halted the bout at 1:09 of Round 1, awarding Holloway a TKO victory due to injury. This unfortunate event marked McGregor's first fight in five years since a severe leg break in 2021. The irony is stark, as he previously tore his ACL against Holloway in 2013. At 37, with a history of major injuries, McGregor's future in mixed martial arts now hangs in serious doubt, awaiting an official medical diagnosis that could potentially end his storied career.
LAS VEGAS, NEVADA - JULY 11: Conor McGregor of Ireland falls after sustaining an injury on a kick in the first around against Max Holloway of the United States in their welterweight bout during UFC 329 at T-Mobile Arena on July 11, 2026 in Las Vegas, Nevada. (Photo by Ian Maule/Getty Images) Getty Images Conor McGregor’s return to the UFC's Octagon lasted 69 seconds. The MMA legend appeared to suffer a knee injury in the opening seconds. After trying to fight for the first minute, Max Holloway wound up with a first-round TKO win after referee Mike Beltran ruled McGregor unfit to continue. Let's talk MMA.
McGregor opened the fight attempting a jumping kick. That decision will be scrutinized heavily in the coming days, weeks and even years. When he landed, his knee visibly gave beneath him.
No official diagnosis has been released. Broadcasters and reporters described it as an apparent “blown-out” knee, and that appears accurate on some level. UFC’s Joe Rogan seemed to break it down well here with slow-motion video.
However, until the UFC or McGregor’s camp confirms an actual injury, that remains an observation .
What is not in dispute is that the leg stopped working immediately. He could not plant, could not push off, and could not throw anything with his lead side. The Octagon surface seemed slippery in other fights as Robert Whittaker also appeared to have some issues with footing. It’ll be interesting to see if footing is mentioned as a potential factor.
McGregor tried to keep going, which made the sequence uglier. He slipped to the canvas twice while Holloway landed punches on a downed opponent, at one point looking around in confusion, unsure whether he should keep firing at an obviously compromised opponent.
Holloway actually asked Beltran whether the referee wanted to step in. The fight continued, and when they stood, Holloway threw a kick at the compromised leg. McGregor took an unsteady step back, winced, and Beltran waved it off at 1:09.
It sucked, but it was the right decision.
Holloway said afterward that he had been trying to get the fight called while McGregor kept asking to continue. The T-Mobile Arena crowd booed, and the main event that carried a five-year buildup was over before it started.