3. Conor McGregor vs. Paddy Doherty
The official time of this KO is listed at 4 seconds.
This fight was from the Immortal Fighting Championships (all fighters are believed to be mortal however) on April 16th 2011. This was during the period in late 2010 and early 2011 when Conor was fighting almost every month, and was coming into this fight with a 6-2 pro record.
Paddy Doherty seemed to be just finding out that MMA was not going to work out for him before this fight, coming into the bout with a 4-6 record. He would retire following another 3 straight losses.
https://www.youtube.com/watch?v=MHhEejA63-c
