Will Conor McGregor Fight Again? Scenarios After UFC 329

Last updated: July 2026  ·  8 min read

Conor McGregor’s long-awaited return lasted 69 seconds. At UFC 329 on July 11, 2026 — his first fight in five years — McGregor attempted a jumping attack in the opening moments against Max Holloway, landed badly, and his knee gave out. He tried to continue, went down twice more, and the referee waved it off. Officially: TKO loss.

The question that dominated the build-up — can McGregor still compete? — was never really answered. So a new one has replaced it: will he fight again at all? This article lays out what we know, what remains uncertain, and the realistic scenarios forecasters are weighing.

What Actually Happened at UFC 329

The fight was booked as a welterweight, non-title rematch thirteen years in the making — McGregor beat Holloway back in 2013, before either man became a champion. This time McGregor entered as a clear underdog after half a decade away, a pricing that reflected exactly the factors we outlined in our pre-fight analysis of McGregor’s 2026 comeback: age, layoff, and injury history.

In the end, none of the stylistic questions mattered. The knee failed on the very first exchange — before Holloway had landed anything significant. McGregor has since said he wants the result overturned to a no contest, arguing the fight was decided by injury rather than competition. Whatever the commission decides, the sporting reality stands: a 38-year-old body with a history of serious leg injuries broke down within a minute of returning.

The Three Scenarios From Here

The Case For Another Fight

Three forces pull toward a return. First, money: even after a 69-second loss, McGregor remains one of the sport’s biggest draws, and a trilogy with Holloway has a built-in narrative — the injury robbed fans of an answer. Second, the ending itself: fighters rarely accept an injury stoppage as their final image, and McGregor’s push to reclassify the result signals he does not view this as a conclusion. Third, the UFC’s incentives: in a year when several marquee stars have lost, promotable names are scarcer than ever.

The Case Against

The counterargument is mostly biological. McGregor is 38, with a broken leg in 2021 and now a second major leg injury in consecutive fights. Rehabilitation from knee surgery at that age typically consumes a year or more, putting any return deep into 2027 — nearly seven years after his last win. As we explored in our analysis of when MMA fighters peak and decline, layoffs and accumulated damage compound aging effects: each additional year away tends to widen the gap between reputation and reality. There is also the question of purpose. McGregor does not need the money, and second comebacks after failed comebacks are among the rarest events in the sport.

How Forecasters Should Read This

Questions like “will McGregor fight again?” are exactly where prediction markets earn their keep, because the answer is a moving probability, not a fact. Markets can price the components separately: whether he fights in 2027, whether the opponent is Holloway, whether the result gets overturned. Each new piece of information — scan results, surgery news, an interview hinting at timelines — should shift those numbers incrementally. If you want a framework for translating such news into probabilities, see our guide on how to read UFC odds and prediction markets. The honest baseline: a return is plausible but no better than a coin flip, and anyone claiming certainty in either direction is overreaching.

Conclusion

UFC 329 resolved nothing and reset everything. McGregor leaves with an injury, an appeal, and an open door; Holloway leaves with a win he didn’t get to earn on his own terms and a trilogy card worth selling. The realistic timeline for any next fight starts in 2027 and depends on a 38-year-old knee cooperating with a punishing rehabilitation. What to watch next: the scan results and surgery decision, the commission’s ruling on the no-contest appeal, and whether the UFC begins openly building toward Holloway–McGregor 3.