Introduction
Jonathan 'The General' Haggerty is the reigning ONE Bantamweight Kickboxing World Champion (since November 2023), former ONE Bantamweight Muay Thai World Champion (April 2023 to September 2024), former ONE Flyweight Muay Thai World Champion (May 2019 to October 2019), and one of the foundational British Muay Thai athletes of his generation. The London-born Knowlesy Academy / Team Underground product — head coach Christian Knowles, three-time ONE World Champion across two sports, second-fastest two-sport ONE World Champion crowning in promotion history (just over six months between his April 2023 Muay Thai title win and November 2023 kickboxing title win) — has built his championship-era prime years on aggressive volume Muay Thai with championship-pace power striking and elite knockout finishing. His most recent fight was the April 29, 2026 ONE Samurai 1 unanimous-decision win over Yuki Yoza in Tokyo — his third successful ONE Bantamweight Kickboxing World Title defense. He has stated his intention to make his MMA debut in 2026 with three-sport ONE World Champion ambitions, with public support from ONE CEO Chatri Sityodtong.
Contents
Quick Stats
Background
Fighting Style
Career Highlights
Notable Fights & Rivalries
Championships & Accolades
Current Status
Fun Facts
Legacy / Verdict
Frequently Asked Questions
References
Quick Stats
Nickname: The General
Age: 29 (born February 18, 1997)
Height: 5'7" (170 cm)
Reach: 70" (178 cm)
Weight Class: Bantamweight (145 lb), Flyweight (135 lb)
Stance: Orthodox
Team: Knowlesy Academy / Team Underground (London, England)
Pro Combat Record: 21-5 Muay Thai/kickboxing combined; reigning ONE Bantamweight Kickboxing World Champion
Background
Born February 18, 1997 in London, England. Jonathan Haggerty began his Muay Thai career as a teenager at Knowlesy Academy / Team Underground in London under head coach Christian Knowles. He turned professional in Muay Thai in 2014 at age 17 and built his championship-era credentials in British and European Muay Thai circuits before signing with ONE Championship in 2018.
He made his ONE Championship debut in 2018 and built his championship-era prime years across multiple ONE world title runs — winning the ONE Flyweight Muay Thai World Title in May 2019, the ONE Bantamweight Muay Thai World Title in April 2023, and the ONE Bantamweight Kickboxing World Title in November 2023. He resides in London and continues to train at Knowlesy Academy / Team Underground under head coach Christian Knowles. He is widely cited as the foundational British Muay Thai superstar in modern ONE Championship competition. He has stated his intention to make his MMA debut in 2026 with three-sport ONE World Champion ambitions, with public support from ONE CEO Chatri Sityodtong.
Fighting Style
Aggressive volume Muay Thai with championship-pace power striking and elite knockout finishing. Haggerty's pattern is textbook British Muay Thai — Knowlesy Academy / Team Underground London-trained pressure combined with championship-level Muay Thai technical precision and the highest-output finishing rate of his championship-era prime years. The April 2023 ONE Fight Night 9 R1 KO of Nong-O Hama for the ONE Bantamweight Muay Thai World Title (one of the most-replayed Muay Thai title-changing finishes of 2023), the November 2023 ONE Fight Night 16 R2 KO of Fabricio Andrade for the ONE Bantamweight Kickboxing World Title, the February 2024 ONE Fight Night 19 R3 TKO defense over Felipe Lobo, the February 2025 ONE 171 unanimous-decision defense over Wei Rui, and the April 2026 ONE Samurai 1 unanimous-decision defense over Yuki Yoza are the canonical examples of his championship-level fighting arsenal.
His weakness across his championship-era prime years has been technical Muay Fimeu Thai-style elite striking precision against the foundational Thai Muay Thai title contender pool. The September 2024 ONE 168: Denver R1 49-second elbow KO loss to Superlek Kiatmuu9 (the title-changing finish that ended his ONE Bantamweight Muay Thai World Title reign), the May 2019 ONE Flyweight Muay Thai World Title loss to Rodtang Jitmuangnon (KO loss in defense), and the multiple defeats against the foundational Thai Muay Thai elite tier reflected variations of the same pattern. Within his championship-era prime years from April 2023 to November 2023, however, his arsenal was the technical floor of ONE bantamweight competition — back-to-back two-sport ONE World Champion titles in just over six months.
Career Highlights
2014 (age 17) — Pro Muay Thai debut.
2018 — ONE Championship debut; foundational British Muay Thai prospect.
May 17, 2019 — ONE: Enter the Dragon vs Sam-A Gaiyanghadao. Won ONE Flyweight Muay Thai World Title by unanimous decision.
October 2019 — ONE: Age of Dragons vs Rodtang Jitmuangnon. Lost ONE Flyweight Muay Thai World Title by unanimous decision.
February 2020 — ONE: King of the Jungle vs Rodtang Jitmuangnon 2. Lost by R2 KO; immediate rematch.
April 22, 2023 — ONE Fight Night 9 vs Nong-O Hama. Won ONE Bantamweight Muay Thai World Title by R1 KO; major upset over reigning champion.
November 4, 2023 — ONE Fight Night 16 vs Fabricio Andrade. Won ONE Bantamweight Kickboxing World Title by R2 KO; two-sport ONE World Champion.
February 16, 2024 — ONE Fight Night 19 vs Felipe Lobo. Title defense by R3 TKO.
September 6, 2024 — ONE 168: Denver vs Superlek Kiatmuu9. Lost ONE Bantamweight Muay Thai World Title by R1 49-second elbow KO.
February 20, 2025 — ONE 171 (Qatar) vs Wei Rui. Title defense by unanimous decision.
November 16, 2025 — Originally scheduled vs Nabil Anane for ONE Bantamweight Muay Thai title at ONE 173 Tokyo; withdrew due to shoulder injury.
April 29, 2026 — ONE Samurai 1 (Ariake Arena Tokyo) vs Yuki Yoza. Title defense by unanimous decision.
Late 2026 — Targeting MMA debut and rematch for ONE Bantamweight Muay Thai World Title; three-sport ONE World Champion ambitions.
Notable Fights & Rivalries
vs Nong-O Hama (ONE Fight Night 9, 2023)
Haggerty's career-defining ONE Bantamweight Muay Thai World Championship-winning fight. He stopped Nong-O Hama — the long-reigning ONE Bantamweight Muay Thai World Champion and one of the most-decorated active Muay Thai fighters in ONE history — by R1 KO at ONE Fight Night 9 on April 22, 2023. The result was widely cited as one of the most-replayed Muay Thai title-changing finishes of 2023 and was the foundational moment of Haggerty's championship-era prime years' two-sport ONE World Champion run.
vs Fabricio Andrade (ONE Fight Night 16, 2023)
Haggerty's two-sport ONE World Champion crowning fight. He stopped Fabricio Andrade — the reigning ONE Bantamweight MMA World Champion making his kickboxing debut on the title fight — by R2 KO at ONE Fight Night 16 on November 4, 2023 to capture the ONE Bantamweight Kickboxing World Title. The result made Haggerty the second-fastest two-sport ONE World Champion in promotion history (just over six months between his April 2023 Muay Thai title win and November 2023 kickboxing title win).
vs Superlek Kiatmuu9 (ONE 168: Denver, 2024)
Haggerty's most-watched ONE 2024 title-changing loss. Superlek Kiatmuu9 — the reigning ONE Flyweight Kickboxing World Champion — stopped Haggerty by R1 49-second elbow KO at ONE 168 on September 6, 2024 in Denver to capture the ONE Bantamweight Muay Thai World Title. Joe Rogan reacted to the finish on broadcast with the now-famous quote 'Oh my God perfect elbow.' The result was widely cited as one of the most-replayed Muay Thai title-changing finishes of 2024 and made Superlek a two-sport, two-division ONE World Champion. Superlek lost the ONE Bantamweight Muay Thai World Title in March 2025 after missing weight ahead of ONE 172.
vs Rodtang Jitmuangnon (2019 + 2020 rematch)
Haggerty's foundational Muay Thai rivalry of his early ONE Championship era. He lost the ONE Flyweight Muay Thai World Title to Rodtang Jitmuangnon — the foundational 'Iron Man' Muay Thai legend — by unanimous decision at ONE: Age of Dragons in October 2019, then lost the immediate rematch at ONE: King of the Jungle in February 2020 by R2 KO. The two-fight series was the foundational moment of Rodtang's ONE Championship championship-era prime years. Rodtang has subsequently been scheduled to face Takeru at ONE Samurai 1 in April 2026 for the interim ONE Flyweight Kickboxing World Title.
vs Yuki Yoza (ONE Samurai 1, 2026)
Haggerty's most-recent ONE Bantamweight Kickboxing World Title defense. He defeated Yuki Yoza — former K-1 Champion who had previously notched back-to-back unanimous-decision wins over Elbrus Osmanov and Petchtanong Petchfergus, and who had defeated Superlek Kiatmuu9 at ONE 173 in November 2025 — by unanimous decision at ONE Samurai 1 on April 29, 2026 in Tokyo. The result was Haggerty's third successful ONE Bantamweight Kickboxing World Title defense and confirmed his championship-level competitive durability against elite Japanese kickboxing competition.
Championships & Accolades
Reigning ONE Bantamweight Kickboxing World Champion (since November 4, 2023).
Three-time ONE World Champion across two sports (Muay Thai and kickboxing).
Three successful ONE Bantamweight Kickboxing World Title defenses (Felipe Lobo February 2024, Wei Rui February 2025, Yuki Yoza April 2026).
Former ONE Bantamweight Muay Thai World Champion (April 22, 2023 to September 6, 2024).
Former ONE Flyweight Muay Thai World Champion (May 17, 2019 to October 2019).
Two-sport ONE World Champion crowned in just over six months (April 2023 Muay Thai, November 2023 kickboxing).
Approximately 21-5 combined Muay Thai/kickboxing career record across 12-year career (2014-present).
Career wins over Nong-O Hama, Fabricio Andrade, Felipe Lobo, Wei Rui, Yuki Yoza, and Sam-A Gaiyanghadao.
Multiple ONE Championship Performance of the Night and Knockout of the Night bonuses.
Knowlesy Academy / Team Underground London-trained — head coach Christian Knowles.
Foundational British Muay Thai superstar in modern ONE Championship competition.
Targeting MMA debut in 2026 with three-sport ONE World Champion ambitions; supported publicly by ONE CEO Chatri Sityodtong.
Current Status
Active in ONE Championship. Haggerty's most recent fight was the April 29, 2026 unanimous-decision win over Yuki Yoza at ONE Samurai 1 in Ariake Arena, Tokyo — his third successful ONE Bantamweight Kickboxing World Title defense. He continues to hold the ONE Bantamweight Kickboxing World Title (since November 2023).
He has stated his intention to make his MMA debut in 2026 with three-sport ONE World Champion ambitions (Muay Thai, kickboxing, and MMA). ONE CEO Chatri Sityodtong has publicly supported the move. He continues to pursue a rematch for the ONE Bantamweight Muay Thai World Title — the title he lost to Superlek Kiatmuu9 in September 2024 (Superlek subsequently lost the title to Nabil Anane after missing weight in March 2025; Anane has subsequently lost the title to Rambolek Chor Ajalaboon). Haggerty has named Rambolek as a target opponent for the Muay Thai title rematch. He continues to train at Knowlesy Academy / Team Underground in London under head coach Christian Knowles. He resides in London and is widely cited as the foundational British Muay Thai superstar in modern ONE Championship competition. He is now 29 years old.
Fun Facts
His nickname 'The General' reflects his championship-pace tactical aggression and battlefield-style Muay Thai pattern — earning him universal respect from peers and trainers as one of the foundational British Muay Thai contributors of his generation.
Was the second-fastest two-sport ONE World Champion in promotion history — capturing the ONE Bantamweight Muay Thai World Title in April 2023 and the ONE Bantamweight Kickboxing World Title in November 2023, just over six months apart.
Stopped Nong-O Hama — the long-reigning ONE Bantamweight Muay Thai World Champion — by R1 KO at ONE Fight Night 9 in April 2023, in one of the most-replayed Muay Thai title-changing finishes of 2023.
Has stated his intention to make his MMA debut in 2026 — making him one of only a handful of ONE Championship athletes to attempt the foundational three-sport ONE World Champion path (Muay Thai, kickboxing, MMA).
Trains at Knowlesy Academy / Team Underground in London under head coach Christian Knowles — the same training base that produced multiple British Muay Thai championship-era prime years competitors.
Was the subject of Joe Rogan's now-famous 'Oh my God perfect elbow' commentary call when Superlek Kiatmuu9 stopped him by R1 49-second elbow KO at ONE 168: Denver in September 2024.
Withdrew from his November 16, 2025 ONE 173 Tokyo bout against Nabil Anane for the ONE Bantamweight Muay Thai World Title due to a shoulder injury — making him one of only a handful of ONE Bantamweight Muay Thai World Title contenders to withdraw from a scheduled title fight in promotion history.
Has named Rambolek Chor Ajalaboon as a target opponent for his ONE Bantamweight Muay Thai title rematch — Rambolek subsequently captured the title from Nabil Anane in early 2026.
Is widely cited as the foundational British Muay Thai superstar in modern ONE Championship competition — and the most-watched non-Thai non-Asian Muay Thai title contender in ONE Championship history.
Legacy / Verdict
Jonathan 'The General' Haggerty is one of the foundational British Muay Thai athletes of his generation and the most-watched non-Thai Muay Thai title contender in modern ONE Championship history. The April 2023 ONE Fight Night 9 R1 KO of Nong-O Hama for the ONE Bantamweight Muay Thai World Title (one of the most-replayed Muay Thai title-changing finishes of 2023), the November 2023 ONE Fight Night 16 R2 KO of Fabricio Andrade for the ONE Bantamweight Kickboxing World Title (the second-fastest two-sport ONE World Champion crowning in promotion history), the May 2019 ONE: Enter the Dragon unanimous-decision win over Sam-A Gaiyanghadao for the ONE Flyweight Muay Thai World Title, the three successful ONE Bantamweight Kickboxing World Title defenses (Lobo February 2024, Wei Rui February 2025, Yoza April 2026), the foundational Knowlesy Academy / Team Underground London training base under Christian Knowles, the approximately 21-5 combined Muay Thai/kickboxing career record across 12 years, and the targeted 2026 MMA debut with three-sport ONE World Champion ambitions together place him in the conversation for greatest British Muay Thai athlete in modern ONE Championship competition.
What complicates the legacy is the Thai-Muay-Thai-elite-tier stretch — the 2019-2020 two-fight loss series to Rodtang Jitmuangnon, the September 2024 ONE 168: Denver R1 49-second elbow KO loss to Superlek Kiatmuu9 that ended his ONE Bantamweight Muay Thai World Title reign in his first defense, and the November 2025 ONE 173 Tokyo Nabil Anane title fight withdrawal due to shoulder injury. The competitive resume is permanent and the championship-era prime years are settled. The legacy as the foundational British Muay Thai superstar in modern ONE Championship competition is permanent — and the targeted 2026 MMA debut with three-sport ONE World Champion ambitions represents one of the most-watched career-arc-expansion storylines in modern Muay Thai.
Frequently Asked Questions
Is Jonathan Haggerty the ONE Bantamweight Kickboxing World Champion?
Yes. He is the reigning ONE Bantamweight Kickboxing World Champion — winning the title on November 4, 2023 at ONE Fight Night 16 by R2 KO over Fabricio Andrade. He has successfully defended the title three times: against Felipe Lobo (R3 TKO at ONE Fight Night 19, February 2024), against Wei Rui (unanimous decision at ONE 171 in Qatar, February 2025), and against Yuki Yoza (unanimous decision at ONE Samurai 1 in Tokyo, April 2026). He held the ONE Bantamweight Muay Thai World Title concurrently from April 2023 until losing it to Superlek in September 2024.
What happened in Haggerty vs Superlek?
Superlek Kiatmuu9 stopped Haggerty by R1 49-second elbow KO at ONE 168: Denver on September 6, 2024 — capturing the ONE Bantamweight Muay Thai World Title from Haggerty in his first defense. Joe Rogan reacted to the finish on broadcast with the now-famous quote 'Oh my God perfect elbow.' The result was widely cited as one of the most-replayed Muay Thai title-changing finishes of 2024. Haggerty retains the ONE Bantamweight Kickboxing World Title and continues to pursue regaining the Muay Thai title in the bantamweight division.
What is Jonathan Haggerty's Muay Thai/kickboxing record?
Approximately 21 wins and 5 losses across his combined Muay Thai and kickboxing career. He turned professional in Muay Thai in 2014 at age 17 and is widely considered one of the greatest British Muay Thai fighters of his generation. He has competed exclusively in ONE Championship since his 2018 promotional debut — earning three world titles across two sports (ONE Flyweight Muay Thai, ONE Bantamweight Muay Thai, ONE Bantamweight Kickboxing).
What style does Jonathan Haggerty fight?
Aggressive volume Muay Thai with championship-pace power striking and elite knockout finishing. Haggerty's pattern is textbook British Muay Thai — Knowlesy Academy / Team Underground London-trained pressure combined with championship-level Muay Thai technical precision and the highest-output finishing rate of his championship-era prime years. The April 2023 ONE Fight Night 9 R1 KO of Nong-O Hama for the ONE Bantamweight Muay Thai World Title (one of the most-replayed Muay Thai title-changing finishes of 2023), the November 2023 ONE Fight Night 16 R2 KO of Fabricio Andrade for the ONE Bantamweight Kickboxing World Title, and the February 2024 ONE Fight Night 19 R3 TKO defense over Felipe Lobo are the canonical examples of his championship-level fighting arsenal.
Where is Jonathan Haggerty from?
Born February 18, 1997 in London, England. Haggerty trains at Knowlesy Academy / Team Underground in London under head coach Christian Knowles. He is widely considered one of the greatest British Muay Thai fighters of his generation and is the foundational British Muay Thai superstar in modern ONE Championship competition. He resides in London and is one of the most globally-recognized British combat sports athletes of the modern era.
Will Jonathan Haggerty make his MMA debut?
Yes — he has stated his intention to make his MMA debut in 2026, with three-sport ONE World Champion ambitions (Muay Thai, kickboxing, and MMA). ONE CEO Chatri Sityodtong has publicly supported the move and confirmed ONE Championship is willing to facilitate the transition. The MMA debut would make Haggerty one of only a handful of ONE Championship athletes to compete across all three sports — and the foundational British Muay Thai athlete to attempt the three-sport ONE World Champion path. No specific MMA debut date or opponent has been announced.
References
Wikipedia — Jonathan Haggerty career overview
ONE Championship — Jonathan Haggerty athlete profile
ONE Championship — Haggerty defends ONE Bantamweight Kickboxing title at ONE Samurai 1