Welterweight title: Kamaru Usman (16-1) vs. Gilbert Burns (19-3)
Featherweight title: Alexander Volkanovski (21-1) vs. Max Holloway (21-5)
Vacant bantamweight title: Petr Yan (14-1) vs. José Aldo (28-6)
Women's strawweight: Rose Namajunas (9-4) vs. Jéssica Andrade (20-7)
Women's flyweight: Amanda Ribas (9-1) vs. Paige VanZant (8-4)
UFC 251 prelims (LIVE now on ESPN)
Light heavyweight: Volkan Oezdemir (17-4) vs. Jiu0159í Procházka (26-3)
Welterweight: Elizeu Zaleski dos Santos (22-6) vs. Muslim Salikhov (16-2)
Featherweight: Makwan Amirkhani (15-4) vs. Danny Henry (12-3)
Lightweight: Leonardo Santos (16-4-1) vs. Roman Bogatov (10-0)
UFC 251 early prelims results
Heavyweight: Marcin Tybura (19-6) def.