Thales Leites has nine losses against nine opponents on his MMA record. For a list of Leites's best fights, refer to "Best fights of Thales Leites".
On May 12, 2018 Thales Leites faced off against Jack Hermansson in a middleweight bout at age 36. He was coming in with a record of 27-9 (17), and Hermansson was 29 years old and with a record of 16-4 (13). Leites lost the fight via 3rd-round TKO.
On October 7, 2017 Thales Leites faced off against Brad Tavares in a middleweight bout at age 36. He was coming in with a record of 27-8 (17), and Tavares was 29 years old and with a record of 15-4 (6). Leites lost the fight via 3-round unanimous decision.
On November 19, 2016 Thales Leites faced off against Krzysztof Jotko in a middleweight bout at age 35. He was coming in with a record of 26-7 (17), and Jotko was 27 years old and with a record of 18-1 (7). Leites lost the fight via 3-round unanimous decision.
On February 27, 2016 Thales Leites faced off against Gegard Mousasi in a middleweight bout at age 34. He was coming in with a record of 25-6 (16), and Mousasi was 30 years old and with a record of 37-6-2 (32). Leites lost the fight via 3-round unanimous decision.
On July 18, 2015 Thales Leites faced off against Michael Bisping in a middleweight bout at age 33. He was coming in with a record of 25-5 (16), and Bisping was 36 years old and with a record of 26-7 (19). Leites lost the fight via 5-round split decision.
On August 14, 2010 Thales Leites faced off against Matt Horwich in a middleweight bout at age 28. He was coming in with a record of 17-4 (12), and Horwich was 32 years old and with a record of 24-16-1 (21). Leites lost the fight via 4th-round submission.
On August 8, 2009 Thales Leites faced off against Alessio Sakara in a middleweight bout at age 27. He was coming in with a record of 14-3 (10), and Sakara was 27 years old and with a record of 14-7 (11). Leites lost the fight via 3-round split decision.
On April 18, 2009 Thales Leites fought Anderson Silva in a middleweight title fight for Silva's UFC Championship title. Leites was 27 years old and with a record of 14-2 (10), and Silva was 34 years old and with a record of 25-4 (20). Leites lost the fight via 5-round unanimous decision.
On November 11, 2006 Thales Leites faced off against Martin Kampmann at age 25. He was coming in with a record of 9-1 (7), and Kampmann was 24 years old and with a record of 10-1 (9). Leites lost the fight via 3-round unanimous decision.
