A former Real Xtreme Fighting (RXF) Light Heavyweight champion, Negumereanu is known for making his entrance in a traditional Dacian hat called pileus.

[9] Negumereanu, as a last-minute replacement for Gökhan Saki, faced Saparbek Safarov on March 16, 2019, at UFC Fight Night: Till vs. Masvidal in London, England.

[12] Negumereanu stated that he accepted the fight with Safarov only three weeks before, and he fought with a cracked hand and a cold.

[13][14] Negumereanu faced Aleksa Camur at UFC on ESPN: The Korean Zombie vs. Ige on June 19, 2021.

This fight had its fair share of controversy after Negumereanu repeatedly illegally held holding Camur against the fence.

[16][17] Negumereanu faced Ike Villanueva on October 23, 2021, at UFC Fight Night: Costa vs.

[23] Negumereanu was scheduled to face Alonzo Menifield on June 4, 2022, at UFC Fight Night 207.

He said his idol is Lucian Bute, and that he was also inspired by Leonard Dorin Doroftei and Alexandru Lungu.