Jairzinho Rozenstruik Signs With FNC, Ends Two-Year MMA Hiatus
Former UFC heavyweight contender Jairzinho Rozenstruik will return to MMA at FNC 37 in Munich on February 6.
Jairzinho Rozenstruik is back in the MMA business. The former UFC heavyweight contender has signed with Fight Nation Championship and will make his promotional debut at FNC 37 on February 6, 2027, in Munich, per Sherdog.
The fight will end a two-year absence from MMA for Rozenstruik, 38, who holds a 16-6 record. His last MMA bout was a unanimous decision loss to Sergei Pavlovich in the UFC in February 2025.
Rozenstruik's UFC resume carries serious names. During his time in the promotion, "Bigi Boy" picked up wins over Tai Tuivasa, Shamil Gaziev, Junior dos Santos, Alistair Overeem, and Andrei Arlovski. He was a legitimate top-10 heavyweight for several years.
After leaving the UFC, Rozenstruik stayed active in combat sports. He won two bouts with Dirty Boxing Championship and captured the promotion's inaugural heavyweight title in August 2025.
No opponent has been announced for the FNC 37 debut. Fight Nation Championship continues to build its roster with UFC veterans, and Rozenstruik gives them a former contender with knockout power and name recognition in the European market.
This is a smart move for Rozenstruik. He is 38 and was never going to fight for a UFC title again, but the man still hits like a truck and has a name that European MMA fans recognize.
FNC is doing what every mid-tier promotion should be doing right now: signing UFC veterans who still have gas in the tank and putting them in front of crowds that will pay to see them. Munich in February is not a bad landing spot for Bigi Boy.
The question is whether Rozenstruik's chin holds up after two years away from real MMA competition. Dirty Boxing is not the same sport. But if he comes in shape and they match him right, he could be a main event-level heavyweight for FNC for a couple of years. Worst case, he gets paid well and fights in Europe. There are worse exits from the UFC.
