Vitor Belfort leads UFC history with 11 first-round knockouts

Vitor Belfort holds the UFC record with 11 first-round knockouts. Anthony Johnson ranks second with 9, while Michal Oleksiejczuk has 8. Sergey Pavlovich, Francis Ngannou, Andrei Arlovski, Cain Velasquez, Anderson Silva, and Derrick Lewis are tied with 7 first-round knockouts each.