Conor McGregor needed 13 seconds to beat José Aldo at UFC 194.
The featherweight title fight took place on December 12, 2015, at the MGM Grand Garden Arena in Las Vegas. Aldo was the undisputed champion, while McGregor held the interim belt after defeating Chad Mendes at UFC 189. Their meeting unified the division’s titles.
McGregor controlled the center immediately. As Aldo rushed forward with a combination, McGregor landed a perfectly timed left hook that struck first and knocked Aldo unconscious. McGregor followed with hammer fists before referee John McCarthy stopped the bout. The official time was 13 seconds, making it the fastest finish in UFC title-fight history at the time.
A common mix-up is treating the fight as a long-anticipated tactical battle because of the intense promotion and the fighters’ reputations. Instead, it ended almost instantly. The victory made McGregor the first fighter in UFC history to hold championships in two weight classes simultaneously, although he later vacated the featherweight title.