UpNext Fighting is the premier and active MMA organization in California; since May 2022, the roster has grown from 30 fighters to over 350, making UNF one of the fastest-growing regional MMA promotions in the United States.

Features Romero vs. Diaz in a bout from Commerce, Calif., from Feb. 24, 2024.

Features Romero vs. Diaz in a bout from Commerce, Calif. on Feb. 24, 2025.