Here is a list of Souza's best fights. For a list of Souza's losses, refer to "Roberto de Souza Losses".
On April 17, 2022 Roberto de Souza met Johnny Case in a lightweight (Rizin Championship) title defense fight. Souza was 32 years old and with a record of 14-1 (14), and Case was 32 years old and with a record of 27-7-1 (22). Souza stopped Johnny Case via 1st-round submission and successfully defended his title.
On June 13, 2021 Roberto de Souza fought Tofiq Musayev in a lightweight title fight for Musayev's Rizin Championship title. Souza was 31 years old and with a record of 12-1 (12), and Musayev was 31 years old and with a record of 19-3 (17). Souza stopped Tofiq Musayev via 1st-round submission and is crowned the new Rizin lightweight champion.
On July 28, 2019 Roberto de Souza faced off against Mizuto Hirota in a lightweight bout at age 29. He was coming in with a record of 9-0 (9), and Hirota was 38 years old and with a record of 18-10-2 (10). Souza stopped Mizuto Hirota via KO.
On March 21, 2021 Roberto de Souza faced off against Kazuki Tokudome in a lightweight bout at age 31. He was coming in with a record of 11-1 (11), and Tokudome was 34 years old and with a record of 20-10-1 (14). Souza stopped Kazuki Tokudome via submission.
On March 23, 2024 Roberto de Souza faced off against Keita Nakamura in a lightweight bout at age 34. He was coming in with a record of 16-3 (15), and Nakamura was 39 years old and with a record of 36-11-2 (23). Souza stopped Keita Nakamura via TKO.
On April 21, 2019 Roberto de Souza faced off against Satoru Kitaoka in a lightweight bout at age 29. He was coming in with a record of 8-0 (8), and Kitaoka was 39 years old and with a record of 42-18-9 (18). Souza stopped Satoru Kitaoka via TKO.
On December 31, 2021 Roberto de Souza met Yusuke Yachi in a lightweight (Rizin Championship) title defense fight. Souza was 32 years old and with a record of 13-1 (13). Souza stopped Yusuke Yachi via 2nd-round submission and successfully defended his title.
On May 6, 2023 Roberto de Souza faced off against Spike Carlyle in a lightweight bout at age 33. He was coming in with a record of 15-2 (14), and Carlyle was 30 years old and with a record of 14-4 (11). Souza won the fight via 3-round unanimous decision.
On December 5, 2015 Roberto de Souza faced off against Ryuki Ueyama in a super-lightweight bout at age 26. He was coming in with a record of 3-0 (3), and Ueyama was 39 years old and with a record of 11-16-5 (7). Souza stopped Ryuki Ueyama via submission.
On December 31, 2024 Roberto de Souza met Vugar Karamov in a lightweight (Rizin Championship) title defense fight. Souza was 35 years old and with a record of 18-3 (17). Souza stopped Vugar Karamov via 1st-round submission and successfully defended his title.
