Thalles Renan Ferreira (born 23 November 1989) is a Brazilian professional mixed martial artist who competes in the Heavyweight division of Professional Fighters League (PFL). He won the 2023 PFL Heavyweight Championship. Ferreira has been a professional MMA fighter since 2013 and has previously competed in the Legacy Fighting Alliance (LFA). As of March 26, 2026, he is #2 in the PFL heavyweight rankings.
Before pursuing a full-time career in fighting, Ferreira worked as a private security guard and construction worker. His journey into mixed martial arts began in 2013 when he trained in jiu-jitsu at a social project for low-income kids in Brasilia. Three years later, after moving to Rio de Janeiro, he left his previous jobs to focus exclusively on MMA.
Moving to Rio marked a significant turning point in his career, as he trained at the gym of MMA legends, the twins Big Nog and Lil Nog. At the gym, he interacted with former UFC stars as Jacare Souza and Junior dos Santos.
Additionally, Ferreira was invited to portray Werdum in a biographical film about jiu-jitsu legend Fernando Tererê, titled "O Faixa Preta."
Ferreira started his professional MMA career in 2013, amassed a record of 5âÂÂ1 before signing with the Legacy Fighting Alliance.
In his LFA debut, Ferreira faced Brett Martin on June 28, 2019, at . He lost the bout by disqualification as a result of illegal strikes.
Ferreira faced Jared Vanderaa on August 30, 2019, at . He won the bout via triangle choke submission in the second round.
Ferreira made his promotional debut against FabrÃÂcio Werdum on May 6, 2021, at PFL 3. He initially won the fight via technical knockout in the first round. However, the result was surrounded by controversy, as replays showed Ferreira tapping out while Werdum had him in a triangle choke before Ferreira finished Werdum. On May 10, the New Jersey State Athletic Control Board announced that Ferreira's TKO win against Werdum was overturned to a no contest due to his controversial stoppage.
Ferreira was then scheduled to face 2019 Professional Fighters League season Heavyweight Champion Ali Isaev on June 25, 2021, at PFL 6. However, Isaev was forced to withdraw from the event after not being medically cleared to compete and was replaced by PFL newcomer Stuart Austin. Austin was subsequently pulled from the bout for unknown reasons and replaced by returning PFL fighter, Carl Seumanutafa. Ferreira won the bout via unanimous decision.
Starting the 2022 season, Ferreira faced Jamelle Jones on April 28, 2022, at PFL 2. He won the bout by first-round knockout.
On June 24, 2022, Ferreira faced Klidson Abreu at PFL 5. He initially lost the bout by unanimous decision; however, the Georgia Athletic and Entertainment Commission later overturned the result to a no contest after Abreu failed a drug test for unspecified substances.
Ferreira then faced Ante Delija on August 13, 2022, at PFL 8, where he lost the bout by first-round TKO.
In the 2023 season, Ferreira started by going up against Rizvan Kuniev on April 7, 2023, at PFL 2. He initially lost the fight by unanimous decision, but the result was changed to a no contest when Kuniev failed a drug test.
Ferreira fought Matheus Scheffel on June 16, 2023, at PFL 5, winning the bout by first-round knockout.
In the semi-finals, Ferreira faced Maurice Greene on August 18, 2023, at PFL 8, winning the fight via knockout in the first round.
Heading into the finals of the heavyweight tournament, Ferreira faced Denis Goltsov on November 24, 2023, at PFL 10. He won the bout by second-round TKO, claiming the 2023 Heavyweight tournament title and the $1 million collective prize.
Ferreira faced Bellator Heavyweight Champion Ryan Bader in a three-round non-title crossover fight on February 24, 2024, at PFL vs. Bellator. He won the bout by knockout just twenty-one seconds into the first round.
Ferreira fought former UFC Heavyweight Champion Francis Ngannou for the PFL Heavyweight Superfight Championship on October 19, 2024, at . He lost the fight by knockout due to ground punches in the first round.
Ferreira faced former Bellator Light Heavyweight Champion Vadim Nemkov for the vacant PFL Heavyweight Championship on December 13, 2025, at PFL Europe 4. He lost the fight via submission in the first round.
|- |Loss |align=center|13âÂÂ5 (3) |Vadim Nemkov |Submission (arm-triangle choke) |PFL Champions Series 4 | |align=center|1 |align=center|4:00 |Décines-Charpieu, France | |- |Loss |align=center|13âÂÂ4 (3) |Francis Ngannou |KO (punches) | | |align=center|1 |align=center|3:32 |Riyadh, Saudi Arabia | |- |Win |align=center|13âÂÂ3 (3) |Ryan Bader |TKO (punches) |PFL vs. Bellator | |align=center|1 |align=center|0:21 |Riyadh, Saudi Arabia | |- |Win |align=center| |Denis Goltsov |TKO (punches) |PFL 10 (2023) | |align=center|2 |align=center|0:26 |Washington, D.C., United States | |- |Win |align=center|11âÂÂ3 (3) |Maurice Greene |KO (punches) |PFL 8 (2023) | |align=center|1 |align=center|4:46 |New York City, New York, United States | |- |Win |align=center|10âÂÂ3 (3) |Matheus Scheffel |KO (punch) |PFL 5 (2023) | |align=center|1 |align=center|0:50 |Atlanta, Georgia, United States | |- |NC |align=center|9âÂÂ3 (3) |Rizvan Kuniev |NC (overturned) |PFL 2 (2023) | |align=center|3 |align=center|5:00 |Las Vegas, Nevada, United States | |- |Loss |align=center|9âÂÂ3 (2) |Ante Delija |TKO (punches) |PFL 8 (2022) | |align=center|1 |align=center|4:31 |Cardiff, Wales | |- |NC |align=center|9âÂÂ2 (2) |Klidson Abreu |NC (overturned) |PFL 5 (2022) | |align=center|3 |align=center|5:00 |Atlanta, Georgia, United States | |- |Win |align=center|9âÂÂ2 (1) |Jamelle Jones |KO (front kick and punches) |PFL 2 (2022) | |align=center|1 |align=center|0:25 |Arlington, Texas, United States | |- |Win |align=center|8âÂÂ2 (1) |Stuart Austin |KO (punch) |PFL 8 (2021) | |align=center|1 |align=center|0:31 |Hollywood, Florida, United States | |- |Win |align=center|7âÂÂ2 (1) |Carl Seumanutafa |Decision (unanimous) |PFL 6 (2021) | |align=center|3 |align=center|5:00 |Atlantic City, New Jersey, United States | |- |NC |align=center| |FabrÃÂcio Werdum |NC (overturned) |PFL 3 (2021) | |align=center|1 |align=center|2:32 |Atlantic City, New Jersey, United States | |- |Win |align=center|6âÂÂ2 |Jared Vanderaa |Submission (triangle choke) | | |align=center|2 |align=center|2:37 |Riverside, California, United States | |- |Loss |align=center|5âÂÂ2 |Brett Martin |DQ (illegal strikes) | | |align="center"|1 |align="center"|3:14 |Madison, Wisconsin, United States | |- |Win |align=center|5âÂÂ1 |FabrÃÂcio Almeida |TKO (punches) |Future FC 3 | |align="center"|2 |align="center"|3:57 |Indaiatuba, Brazil | |- |Win |align=center|4âÂÂ1 |Tiago Cardoso |KO (punches) |NCE 30 | |align="center"|1 |align="center"|1:39 |Rio de Janeiro, Brazil | |- |Win |align=center|3âÂÂ1 |Carlos Ruan |KO (punches) |FLC 6 | |align="center"|1 |align="center"|3:30 |Rio de Janeiro, Brazil | |- |Loss |align=center|2âÂÂ1 |Vinicius Moreira |Submission (armbar) |FAM Fight Night 1 | |align="center"|1 |align="center"|3:37 |Goiânia, Brazil | |- |Win |align=center|2âÂÂ0 |Alexandre Sabara |TKO (retirement) |Acai do Japa Fight 2 | |align="center"|2 |align="center"|N/A |Paranoá, Brazil | |- |Win |align=center|1âÂÂ0 |Marcio Marques |TKO (punches) |MMA Fest: Porangatu | |align="center"|1 |align="center"|0:43 |Porangatu, Brazil |