UFC 329 odds: Conor McGregor opens as a sizable betting underdog for rumored comeback rematch against Max Holloway

BOSTON, MA - AUGUST 17: (L-R) Conor McGregor punches Max Holloway in their UFC featherweight bout at TD Garden on August 17, 2013 in Boston, Massachusetts. (Photo by Josh Hedges/Zuffa LLC/Zuffa LLC via Getty Images) | Zuffa LLC via Getty Images “Notorious” is an underdog — at least for now. The long-awaited return of former Ultimate Fighting Championship (UFC) double champion Conor McGregor is once again picking up steam, with rumors pointing toward a blockbuster rematch against former Featherweight and BMF titleholder Max Holloway at UFC 329 during International Fight Week this summer inside T-Mobile Arena in Las Vegas, Nevada.

And if the early betting lines are any indication, oddsmakers aren’t exactly siding with the Irish superstar. According to BetOnline , McGregor has opened as a +235 underdog, while Holloway sits comfortably as a -270 favorite — and within a couple of hours, the line juiced to +270 and -330 The line makes sense on paper. McGregor hasn’t competed since UFC 264 in 2021, where he suffered a gruesome leg break against Dustin Poirier .

Since then, he’s been on the sidelines dealing with injuries, outside ventures, and legal issues — though he’s recently claimed a renewed focus on fighting through religion . Meanwhile, Holloway has stayed active against elite competition. Despite a tough loss to Charles Oliveira in March 2026 that cost him his BMF title , “Blessed” has competed eight times during McGregor’s absence and remains one of the most durable and high-volume strikers in the sport.

The two first met back in 2013, with McGregor earning a unanimous decision win despite tearing his ACL mid-fight . It marked Holloway’s final loss before a historic run that saw him win 13 straight and capture the Featherweight title by stopping Jose Aldo twice. Now, more than a decade later, they could run it back — at very different stages of their careers.