Conor McGregor vs. Max Holloway fight odds: McGregor is huge underdog in UFC 329 return bout

Conor McGregor will return to the UFC for the first time in five years at UFC 329 on July 11, 2026, facing Max Holloway in a rematch at welterweight (170 pounds) as the main event of UFC International Fight Week. Oddsmakers heavily favor Holloway at -450, while McGregor is a +300 underdog with an implied win probability of 25%. McGregor, who will be 37 on fight night, last competed in 2021 when he broke his leg in a loss to Dustin Poirier; he previously defeated Holloway by unanimous decision in 2013.