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1
- Serra vs. St-Pierre I
- Matt Serra | KO/TKO | Round 1
- 2007 | UFC 69
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biggest title upset of all time, bar none
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2
- McGregor vs. Diaz
- Nate Diaz | Submission | Round 2
- 2016 | UFC 196
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a journeyman in any other world beating a world champion in two rounds
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3
- Barber vs. Modafferi
- Roxanne Modafferi | Decision
- 2020 | UFC 246
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biggest female upset of all time, literally derailed a huge hype train DOMINANTLY
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4
- Usman vs. Edwards II
- Leon Edwards | KO/TKO | Round 5
- 2022 | UFC 278
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second biggest title upset ever
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5
- Lauzon vs. Pulver
- Joe Lauzon | KO/TKO | Round 1
- 2006 | UFC 63
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beat a coach of his tuf season before the tuf season even started in under a round
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6
- Sokoudjou vs. Nogueira
- Rameau Thierry Sokoudjou | KO/TKO | RD 1
- 2007 | Pride 33
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underrated upset, often forgot about because of how sokoudjous career played out
My Summary