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McGregor's rise

Conor McGregor's confidence was at an all-time high when he faced Dustin Poirier on Sept. 27, 2014. He was 3-0 in the UFC, one of the most exciting prospects to emerge in years, and he was about to be one of the main attractions on a pay-per-view card.

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hostility

The bad blood between McGregor and Poirier made their clash one of the most-anticipated fights at UFC 178. They traded insults for months, and Poirier didn't think McGregor was ready for the step up in competition.

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conor mcgregor

by the numbers

Sig. strikes
10
Knockdowns
1
Time
1:46
New record
16-2

Josh Hedges / Getty

I said I'd knock him out in the first round. ... You can call me 'Mystic Mac,' because I predict these things.

McGregor discussing KO win vs. Poirier

(UFC)

Jeff Bottari / Getty

Jeff Bottari / Getty

Taking the UFC by storm

McGregor moved to No. 5 in the featherweight division, and the KO of Poirier put him one win away from his first crack at UFC gold in 2015.

Jeff Bottari / Getty