The 20 Biggest Upsets in MMA History
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Matt Serra (+700) upsets Georges St-Pierre (-1000)

Technical Knockout (punches), Round 1

UFC 69: Shootout — 4/7/2007

Coming off a surprisingly easy win over the then-greatest welterweight of all time, Matt Hughes, Georges “Rush” St-Pierre seemed poised to unleash terror across the entire division. Matt Serra, despite not holding a single skill advantage over the new champion, had other plans.

The opening moments lacked much action until an overhand right from the powerful Italian grazed the back of St-Pierre’s head. The champion’s legs became weak and he hobbled around the cage, falling face first onto the mat. Georges got back to his feet but Serra followed up with a barrage of punches, refusing to relent for even a couple seconds. Eventually, the French-Canadian tumbled onto his back and “The Terra” hopped into mount where he unloaded more punishment until the referee had no choice but to step in.

At the time, this wasn’t just one of the biggest UFC upsets in history, it was the biggest. Back then, St-Pierre’s odds of around 10-1 were unheard of for a UFC fight. The market has changed since then and lines like that are much more frequent. Because of that, bigger betting upsets have occurred in the promotion since then, but this still remains the most shocking in the eyes of many.

Opening line: +500 — Bookmaker

Peak line: +850 — Bovada

Closing line: +700 — Bookmaker

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