Roberto de Souza

Rizin 27 – Nagoya was initially scheduled to be a combat sport event held by Rizin Fighting Federation on March 14, 2021 at the Tokyo Dome in Tokyo, Japan. However, in February it was announced that the event was postponed to take place at Nippon Gaishi Hall in Nagoya, Japan, on March 21, 2021.

Bellator vs. RIZIN was a mixed martial arts event that took place on Saturday, December 31, 2022 at the Saitama Super Arena in Saitama, Japan.

RIZIN 42 was a combat sports event that took place on Saturday, May 6, 2023 at the Tokyo Ariake Arena in Tokyo, Japan.

Bellator MMA x Rizin 2 and Super Rizin 2 was a mixed martial arts event being co-promoted by Bellator MMA and the Rizin Fighting Federation that took place on July 30, 2023, at the Saitama Super Arena in Saitama, Japan. A Bellator Lightweight World Grand Prix quarterfinal bout between former Bellator Featherweight Champion A. J. McKee and former Bellator Lightweight Champion Patricky Pitbull was scheduled to headline the event. However, on July 26, it was announced McKee had pulled out of the bout due to medical issues and was replaced by current Rizin Lightweight Champion Roberto de Souza at a catchweight of 161 pounds.[