Bellator MMA vs. Rizin

Bellator MMA vs. Rizin FF and Rizin 40 (also known as  Bellator MMA x Rizin 1) was a mixed martial arts event being co-promoted by Bellator MMA and the Rizin Fighting Federation that took place on December 31, 2022, at the Saitama Super Arena in Saitama, Japan.

Background
The main card saw fighters from each promotion fight each other, with the Bellator representatives including a current champion and three former champions: Patrício Pitbull, A. J. McKee, Juan Archuleta and Kyoji Horiguchi. Matches were contested under Rizin's ruleset, which differs from Bellator's usual Unified Rules of Mixed Martial Arts.

The main card aired tape delayed in the U.S. on Showtime, Bellator's regular broadcast partner.