TLDR
- Jairzinho Rozenstruik has signed with Fight Nation Championship and will debut February 6, 2027 in Munich
- The 38-year-old heavyweight left the UFC in February 2025 after a loss to Sergei Pavlovich
- Rozenstruik went 16-6 during his UFC career with wins over Overeem, dos Santos, and Tuivasa
- He won two fights in Dirty Boxing Championship and captured their inaugural heavyweight title in 2025
- No opponent has been announced yet for his FNC 37 debut
Sources: sherdog.com | mmasucka.com | sports.yahoo.com
Former UFC heavyweight Jairzinho Rozenstruik has signed with Fight Nation Championship and will make his promotional debut February 6, 2027 in Munich, Germany. The Croatian-based promotion announced the signing on Tuesday.
No opponent has been announced for Rozenstruik’s appearance at FNC 37. The terms of his contract were not made public.
The 38-year-old from Suriname will return to MMA competition after a two-year break from the sport. His last scheduled fight will have been more than 24 months before his FNC debut.
🚨 Former UFC contender and current Dirty Boxing heavyweight champion Jairzinho Rozenstruik 🇸🇷 (15-6) has signed with FNC MMA. ✍️
A bit of a surprise move, considering promotions like PFL/MVP, KSW, ACA, or OKTAGON seemed like more expected landing spots. Huge addition for FNC! pic.twitter.com/gKD7tgIPZn
— COMBAT SPORTS TODAY (@CSTodayNews) October 13, 2026
From UFC Success to Departure
Rozenstruik parted ways with the UFC in February 2025 following a unanimous decision loss to Sergei Pavlovich. He competed 15 times inside the Octagon during his run with the promotion.
The heavyweight known as “Bigi Boy” arrived in the UFC undefeated in 2019. In his first year with the company, he won all four of his fights by knockout.
His UFC victories included impressive wins over former champions and top contenders. Rozenstruik defeated Alistair Overeem, Andrei Arlovski, Junior dos Santos, Tai Tuivasa, and Shamil Gaziev during his tenure.
However, Rozenstruik also faced setbacks against elite competition. He suffered losses to Francis Ngannou, Ciryl Gane, Curtis Blaydes, Alexander Volkov, and Jailton Almeida.
Rozenstruik finished his UFC career with a 16-6 professional record. His first career defeat came in 2020 when he was knocked out by Ngannou.
Success in Dirty Boxing Championship
After leaving the UFC, Rozenstruik competed twice under the Dirty Boxing Championship banner. He won both fights in that promotion.
In August 2025, Rozenstruik captured the inaugural Dirty Boxing heavyweight title. He defeated Rakim Cleveland by technical knockout to claim the championship.
Reports emerged in August 2025 that Rozenstruik had signed with the Professional Fighters League. The PFL never announced a specific debut date or opponent for him.
In a change of plans, Rozenstruik signed with FNC instead. He will not make an appearance for the PFL.
Fight Nation Championship has not yet revealed who Rozenstruik will face in his first bout with the organization. The February 6 event in Munich will mark his first fight under the FNC banner.
