Conor McGregor’s much-anticipated return to the Octagon came to a shocking halt in barely a minute on Saturday after the Irish star sustained a serious-looking injury in the opening moments of his UFC 329 bout.
McGregor, 37, was competing for the first time in five years as he faced Max Holloway in front of a packed crowd at T-Mobile Arena in Las Vegas. But the comeback many of his devoted supporters had traveled to Sin City to witness quickly turned into a nightmare.
The trouble began with McGregor’s very first attacking move. He rushed forward and launched a kick that failed to connect with Holloway, appearing to damage his knee as he came down.
McGregor immediately buckled and dropped to the canvas, leaving the arena in disbelief as he struggled to rise just 10 seconds into the main event.
Holloway quickly capitalized, swarming the visibly hurt McGregor with a flurry of punches before the former two-division champion fought through the pain and made it back to his feet.
Moments later, however, McGregor attempted another kick — and suffered the same painful outcome.

Conor McGregor’s long-awaited UFC 329 comeback ended in disastrous fashion on Saturday night

The Irish fighter appeared to suffer a serious knee injury after throwing a kick in the opening seconds

Max Holloway unleashed a barrage of punches down on the wounded McGregor in Las Vegas
He fell to the floor, lay on his back and beckoned Holloway to engage on the ground – but even his welterweight rival was left bemused by McGregor’s actions.
Holloway refused to engage in a wrestling match and, instead, told the referee to allow McGregor back to his feet. That, in turn, was the beginning of the end.
As he stood up again, McGregor was in clear discomfort and could barely support himself as he limped towards Holloway, prompting the referee to wave off the bout.
There was no dramatic finish, no signature knockout blow from Holloway – just a sobering scene as McGregor limped off and his team rushed to his side.
The Irishman was later seen, in videos that circulated social media, leaving the T-Mobile Arena almost immediately as he, presumably, headed to the hospital.
The result brings a thoroughly deflating end to a five-year comeback that had been billed as one of the biggest events in UFC history – and will fuel fresh questions over whether the Irishman’s body can hold up at the top level.
McGregor’s return had been five years in the making. His last appearance in the Octagon ended in gruesome fashion at UFC 264, when he suffered a broken leg against Dustin Poirier that required emergency surgery and a lengthy road back.
The years since brought further disruption, including injury withdrawals, an 18-month suspension for missed drug tests, backdated to September 2024 and only expiring this year, and a Dublin civil jury finding him liable in November 2024 for the sexual assault of Nikita Hand, for which he was ordered to pay $260,000 in damages.



Whatever the questions over his conduct outside the cage, the fight had proved a box-office phenomenon before a punch – or in this case, a kick – was even thrown.
Dana White revealed that UFC 329 did a $25million gate, breaking the previous promotional record of $22million set by UFC 306 at the Sphere in September 2024.
‘The Conor McGregor effect is huge,’ White said. ‘This gate beat it at $25million, so it’s the biggest gate in UFC history for his return. The city is buzzing.’
That record-breaking build-up now stands in stark contrast to an ending nobody could have scripted.
Saturday’s result – a fresh injury sustained on the very first kick of his comeback – will raise immediate and painful questions about whether McGregor’s body can hold up at UFC level again, and about what, if anything, comes next for a 37-year-old whose career now carries almost as much baggage outside the Octagon as inside it.
More to follow.