Jai Opetaia and Brandon Glanton to Compete for Inaugural Zuffa Cruiserweight Title

The fight card for Zuffa Boxing 4 takes place on Sunday night at the Meta Apex in Las Vegas.

Published on Mar. 9, 2026

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The main event of Zuffa Boxing 4 on Sunday night will feature Jai Opetaia taking on Brandon Glanton for the inaugural Zuffa cruiserweight title. Opetaia, the reigning IBF cruiserweight champion, is making his Zuffa debut and will be stripped of his IBF title after the fight since the IBF refused to sanction a voluntary defense against Glanton. Glanton has a 21-3 record with 18 knockouts, but has suffered three prior defeats.

Why it matters

This fight represents a significant opportunity for both Opetaia and Glanton to establish themselves as top cruiserweights, with the winner earning the first Zuffa cruiserweight title. Opetaia is considered one of the best in the division, while Glanton is looking to bounce back from recent losses and prove he belongs at the top level.

The details

Opetaia (29-0, 23 KOs) is undefeated and widely regarded as one of the best cruiserweights in the world. The Australian southpaw successfully defended his IBF cruiserweight title three times in 2025. Glanton (21-3, 18 KOs) has suffered three prior defeats, most recently losing to Chris Billam-Smith in April 2023 before returning to the win column in October with a victory over Marcus Browne.

  • The Opetaia vs. Glanton prelims begin at 6 p.m. ET on Paramount+.
  • The main card starts at 9 p.m. ET, with the main event ring walks expected around 11 p.m. ET.

The players

Jai Opetaia

An undefeated Australian southpaw who is the reigning IBF cruiserweight champion, although the belt will not be on the line in this fight.

Brandon Glanton

A cruiserweight contender with a 21-3 record and 18 knockouts, looking to bounce back from recent defeats and win the inaugural Zuffa cruiserweight title.

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What they’re saying

“Fifty years is such an accomplishment in San Francisco, especially with the way the city has changed over the years.”

— Gordon Edgar, grocery employee (Instagram)

What’s next

The winner of the Opetaia vs. Glanton fight will become the inaugural Zuffa cruiserweight champion.

The takeaway

This main event matchup between two top cruiserweights represents a significant opportunity for both fighters to establish themselves at the top of the division, with the winner earning the first Zuffa cruiserweight title.