Early career Thiago made his professional debut at Storm Samurai 8 in 2005. He fought Ricardo Petrucio and won the fight via submission in round three. His next three fights came on the same night almost a year after his debut. Thiago competed in the Grand Prix Planaltina, winning all three of his fights and became the tournament winner. Thiago finished all three of the fights by submission. After two more victories, Thiago was signed by Jungle Fights MMA. Thiago won four fights for the promotion before being signed by the Ultimate Fighting Championships. He currently trains with the Constrictor Team, an affiliate of Team Black House; the famed gym of
Anderson Silva and the Nogueira brothers.
Ultimate Fighting Championship Thiago never signed a contract before his fight against Koscheck, he was only able to acquire a tryout. Thiago made his UFC debut on February 21, 2009, scoring an upset victory over top contender
Josh Koscheck at
UFC 95. During the fight, commentator
Joe Rogan commented that Thiago's striking looked inferior to Koscheck's. However, Thiago won the fight by KO, with a flush right uppercut and a left hook. The referee stopped the fight before Thiago could pounce on him. Koscheck immediately rose and argued that he was still alert and able to defend himself. Further review of the replay shows Koscheck's eyes roll back as he falls down, giving merit to the stoppage. At the post-fight conference,
Dana White confirmed that Thiago had earned
Knockout of the Night honors. Thiago had his second fight in the UFC, fighting against former title challenger and Koscheck teammate
Jon Fitch at
UFC 100. This was Thiago's first fight in the United States and he lost via unanimous decision. Thiago rebounded with a unanimous decision victory over UFC newcomer
Jacob Volkmann at
UFC 106. In Thiago's fourth outing in the UFC octagon, he was set to have a rematch against
Josh Koscheck at
UFC 109. However, Koscheck pulled out of the bout after an undisclosed injury and was replaced by
AKA teammate
Mike Swick. Thiago won via submission (D'arce Choke) in the second round and earned his second UFC fight bonus with the win. Thiago faced
Martin Kampmann on June 12, 2010, at
UFC 115 where he lost via unanimous decision (30-27, 30-27, 30-27). Thiago lost his second straight fight via unanimous decision to
Diego Sanchez on October 23, 2010, at
UFC 121. Though Thiago started the fight off strong by winning the first round, he began to tire and eventually succumbed to the cardio and wrestling skills of Sanchez in the second and third rounds. The bout earned
Fight of the Night, awarding both fighters an extra paycheck. In November 2010, Thiago signed a new four-fight deal with the UFC. Thiago was expected to face
Johny Hendricks on March 3, 2011, at
UFC Live: Sanchez vs. Kampmann. However, Thiago was forced out of the bout with an elbow injury. Thiago defeated
David Mitchell via unanimous decision on August 27, 2011, at
UFC 134, completely dominating Mitchell throughout all three rounds. Thiago was expected to face
Mike Pyle on January 14, 2012, at
UFC 142. However, Thiago was forced out of the bout with an elbow injury and replaced by
Ricardo Funch. Thiago faced
Siyar Bahadurzada on April 14, 2012, at
UFC on Fuel TV: Gustafsson vs. Silva. He was knocked out less than a minute into the first round after Siyar landed a right hook to the jaw that followed a left jab as Thiago was moving forward. This marked the first time Thiago had been finished in his career. Thiago next faced
Dong Hyun Kim on November 10, 2012, at
UFC on Fuel TV 6. He lost the bout via unanimous decision Thiago was expected to face
Lance Benoist on May 18, 2013, at
UFC on FX 8. However, on April 20, it was announced that Benoist had to pull out of the bout due to an injury. He was replaced by UFC newcomer
Michel Prazeres. Thiago won the fight via unanimous decision. Thiago was expected to face
Kelvin Gastelum on August 28, 2013, at
UFC Fight Night 27. However, Thiago pulled out of the bout citing a knee injury. Thiago faced
Brandon Thatch at
UFC Fight Night 32 on November 9, 2013. He tapped to strikes in the first round after absorbing a knee to the liver. Thiago faced
Gasan Umalatov on May 31, 2014, at
The Ultimate Fighter Brazil 3 Finale. He lost the fight via unanimous decision. Despite being 2–6 in his last eight fights inside the octagon, Thiago signed a new four-fight contract with the
UFC in June 2014. He was expected to face Mike Rhodes at
UFC Fight Night 51 on September 13, 2014. However, Rhodes was forced out of the bout due to injury and was briefly replaced by returning veteran
Joe Riggs. Subsequently, Riggs was forced to pull out of the fight after accidentally shooting himself in the leg while cleaning a pistol at his home. Thiago instead faced
Sean Spencer. Thiago lost the fight via unanimous decision and was subsequently released by the UFC.
Post-UFC career After the release, Thiago was scheduled to face Joe Ray at Rebel FC 3 on June 26, 2015. However, Thiago withdrew from the bout due to an injury. Then he was scheduled to face Abubakar Vagaev at Akhmat Fight Show 18 on April 9, 2016. Thiago was again forced to withdraw from the bout. Thiago faced
Markus Perez for the vacant Thunder Fight Middleweight Championship at Thunder Fight 7 on June 25, 2016. He lost the fight via split decision. Thiago then faced Paulistenio Rocha for the interim TWC Welterweight Championship at The Warriors Combat 3 on August 13, 2016. He won the fight via unanimous decision and claimed the championship. Thiago then faced Cheick Kone at Fight2Night 1 on November 4, 2016. He won the fight via third-round submission. In the sophomore event of the promotion, Thiago faced Faycal Hucin at Fight2Night 2 on April 28, 2017. He won the fight via first-round submission. Thiago faced
Michał Materla at
KSW 40: Dublin on October 22, 2017. He lost the fight via second-round knockout. Thiago faced Ailton Barbosa at Global Legion FC 13 on December 13, 2019. He won the fight via unanimous decision. Six days removed from his previous bout, Thiago faced Sam Liera at SMASH Global 9 on December 19, 2019. He lost the fight via first-round knockout. ==Personal life==