Vitor Belfort holds UFC record with 11 first-round knockouts

Vitor Belfort leads all UFC fighters with 11 first-round knockouts. Anthony Johnson ranks second with nine, while Michal Oleksiejczuk has eight. Sergey Pavlovich, Francis Ngannou, Andrei Arlovski, Cain Velasquez, Anderson Silva, and Derrick Lewis are all tied with seven first-round knockouts each.