Jai Opetaia: Undefeated, Twice a World Champion, and Chasing Undisputed
Thirty professional fights, thirty wins, twenty-three by knockout — Jai Opetaia’s record reads like the résumé of a fighter still building toward his prime rather than one already twice a world champion. The Australian southpaw has spent the past several years quietly assembling one of the most complete undefeated records in world boxing’s cruiserweight division.
From Sydney’s amateur ranks to the professional circuit
Opetaia was born on 30 June 1995 in Sydney, Australia, and made the decision to leave amateur boxing behind at just 19, in 2014, to pursue a professional career. He made his professional debut on 1 August 2015 and built an early unbeaten run, reaching 11-0 by May 2017 before beginning a steady climb through regional and then world-level titles — winning the vacant WBC-OPBF and Australian cruiserweight titles via ninth-round stoppage in 2017, and continuing to add regional belts through wins over Frankie Lopez and Benjamin Kelleher.
Becoming IBF world champion
Opetaia’s breakthrough to genuine world-title level came on 2 July 2022, when he defeated previously unbeaten champion Mairis Briedis by unanimous decision to claim the IBF and Ring magazine cruiserweight titles — a genuinely significant result against a proven, dangerous champion. He defended the IBF title once before vacating it, then reclaimed it as a two-time champion in a 2024 rematch victory over Briedis, going on to make three further successful defences in that second reign, including knockout wins over fellow Australian David Nyika and Italian contender Claudio Squeo, and an eighth-round stoppage of Germany’s Huseyin Cinkara in December 2025.
A new title, and a new promotional path
In March 2026, Opetaia travelled to Las Vegas for his first fight on American soil, defeating Brandon Glanton by unanimous decision (119-106 on all three scorecards) to become the inaugural Zuffa world cruiserweight champion — a new title tied to Dana White and TKO’s expansion into professional boxing promotion. The move carried genuine complications: the IBF reportedly refused to sanction the Glanton bout, raising the possibility Opetaia could be stripped of that specific belt as a result. He addressed the situation candidly afterward: “I’m chasing the belts… I’ve been stripped once before. I’ve been stripped again. I’ll get the belt back, and I’ll become undisputed.”
The push toward undisputed status
Opetaia has been vocal about wanting to unify the cruiserweight division, previously calling out Mexican contender Gilberto “Zurdo” Ramirez without managing to secure that fight. Potential future opponents floated for Opetaia include Ramirez, Chris Billam-Smith, Ryan Rozicki, and even a move up to challenge unified light-heavyweight champion Dmitry Bivol — a genuinely ambitious set of options for a fighter still working to fully unify his own division first.
What makes him effective
Opetaia fights as a tall, long-armed southpaw — standing 6 feet 2 inches with a 76-inch reach — a genuinely difficult physical profile for cruiserweight opponents to solve, combined with a 76% knockout rate that reflects real one-punch power alongside his boxing craft. His uppercuts specifically have been repeatedly cited by observers as a particularly effective weapon, including in his win over Glanton.
Where his career stands
Jai Opetaia’s record — 30 fights, 30 wins, two separate reigns as IBF cruiserweight champion, the Ring magazine title since 2022, and now a new Zuffa championship won on his first appearance in the United States — places him among the most accomplished active fighters in his weight class, undefeated deep into his professional career. With genuine unification opportunities still on the table and his stated ambition to become the division’s undisputed champion, Opetaia’s story looks far from finished.
Quick facts
Full name: Jai Tapu Opetaia | Born: 30 June 1995, Sydney, Australia | Record: 30-0 (23 KOs) | Notable: Two-time IBF cruiserweight world champion, Ring magazine cruiserweight champion since 2022, inaugural Zuffa world cruiserweight champion (2026), undefeated across his entire professional career.
Frequently asked questions
What is Jai Opetaia’s professional boxing record?
30 wins, 0 losses, with 23 of those wins coming by knockout.
Has Jai Opetaia been a world champion?
Yes — he’s held the IBF cruiserweight title twice (2022 and again from 2024) and has held the Ring magazine title since 2022, plus winning the new Zuffa cruiserweight title in 2026.
Who did Jai Opetaia beat to become champion?
Mairis Briedis, twice — first in 2022 to win the title, then again in a 2024 rematch to reclaim it.
Is Jai Opetaia at risk of losing his IBF title?
Reports suggest he could be stripped of the belt after the IBF declined to sanction his March 2026 fight against Brandon Glanton, though Opetaia says he intends to reclaim it and eventually unify the division.
What weight class does Jai Opetaia fight in?
Cruiserweight, though he’s also been linked to potential future fights at heavyweight or against light-heavyweight champion Dmitry Bivol.