UFC 278: Usman vs. Edwards 2

UFC 278 was defined by one of the most shocking moments in MMA history. Kamaru Usman looked to continue his dominant Welterweight reign against Leon Edwards, attempting to tie Anderson Silva’s all-time UFC win streak record, but Edwards produced a stunning fifth-round head-kick knockout to become Champion. José Aldo also retired for the first time following his unanimous decision loss to Merab Dvalishvili, before later exiting retirement at UFC 301.