RIZIN 14: RIZIN 14 live from the Saitama Super Arena in Saitama, Japan. The biggest event in the promotion’s history features 14 fights in the final MMA event of the year. In the night’s headliner, boxing great Floyd Mayweather Jr. competes in the country of Japan for the first time in a three-round boxing exhibition with Japanese prodigy Tenshin Nasukawa, who is undefeated as a professional combat-sports athlete. The co-headliner features two of the best bantamweights in the world. Bellator bantamweight champion Darrion Caldwell challenges Kyoji Horiguchi for the inaugural RIZIN bantamweight title.