#2 Jose Aldo
The conquest that made Conor McGregor who he is today. After a year's worth of taunting and prodding Jose Aldo, McGregor finally stepped into the octagon with the Featherweight king and made short work of the Brazilian. It was a 13-second job to be precise.
Aldo was the reigning UFC Featherweight Champion and hadn't been defeated for 10 years before his run in with McGregor. The more McGregor taunted him, the more Aldo let his anger take hold of his strategy leading to his eventual demolition at the hands of The Notorious One.
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The worst part about this for Aldo was that he has never seemed like the same man since his defeat to the Irishman and this hilarious picture of Aldo's face just after McGregor's fist connected has definitely played its part in never letting him forget it.