Vitor Belfort leads UFC history with 11 first-round knockouts

Vitor Belfort holds the all-time UFC record for first-round knockouts with 11, ahead of Anthony Johnson's nine and Michal Oleksiejczuk's eight. Sergei Pavlovich, Francis Ngannou, Andrei Arlovski, Cain Velasquez, Anderson Silva, and Derrick Lewis are also on the list with seven apiece.