Cezary Oleksiejczuk

Cezary Oleksiejczuk is a Polish mixed martial artist competing in the UFC’s middleweight division. The UFC currently lists him as active and identifies The Fighting Nerds as his training team. He was born in Włodawa, Poland, and is the younger brother of UFC fighter Michał Oleksiejczuk. UFC’s athlete profile lists him at 6 feet 3 inches tall with a 75.5-inch reach.

Oleksiejczuk began training in MMA at 14 after encouragement from his brother. Before joining the UFC, he became FEN welterweight champion by defeating Aigun Akhmedov by unanimous decision at FEN 37 on November 27, 2021. He later earned a UFC contract with a first-round stoppage of Theo Haig on Dana White’s Contender Series in September 2025.

Oleksiejczuk made his UFC debut against Cesar Almeida on December 13, 2025, winning by unanimous decision. His approach in that bout emphasized wrestling, takedowns and positional control, while his earlier career included notable knockout victories. The UFC also records that he has trained in São Paulo with The Fighting Nerds, including sparring with Alex Pereira.