#3 Ivan Buchinger
From one historic night to another. At number 3 we have one of the most satisfying knockouts you are ever going to see. It is also the punch that landed the Irishman in the UFC.
Similar to number 4, McGregor came into this one as the featherweight champion, looking to become the lightweight champion as well, but this time, with Cage Warriors. 'The Notorious' of course did that and became the first man to hold two titles at the same time with that organisation too.
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The victory came by way of knockout after slipping an oncoming right hand from Buchinger and then putting him to sleep with a perfectly timed left hand, showing he has serious one-punch knockout power. After this fight, McGregor was signed by the UFC and the rest as they say, is history.