The 20 Biggest Upsets in MMA History
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T.J. Dillashaw (+765) upsets Renan Barao (-1250)

Technical Knockout, Round 5

UFC 173: Barao vs Dillshaw — 5/24/2014

Renan Barao was being touted by the UFC as the world best pound-for-pound fighter heading into his UFC bantamweight title defense against the promising, yet raw, T.J. Dillashaw. He seemed to have an edge in every area on paper in what appeared to be an easy fight to call. Not to mention the champ held a 33-1-1 record and was unbeaten in his last 33 professional fights while Dillashaw was a young 9-2 in his pro campaign.

What transpired was nothing short of shocking. Not only did T.J. get the upset, but he dominated the then-champion from bell to bell in every area of the game. He was crisper and faster on the feet, had the better combinations, rocked the champion repeatedly, and even won the limited time spent on the mat. Then, ultimately, he put the stampdown in round five with a vicious assault that left “The Baron” unable to defend himself. This wasn’t just a lucky punch or a bad judges decision like some of the other upsets on this list — it was a 23 minute beatdown.

This marked the third week in a row where a new top five upset in MMA history occurred. The previous week had Will Brooks upset Michael Chandler at +800, who you’ll see later on this list, while the week before that had the aforementioned Johnny Eduardo upset Eddie Wineland at +735.

Opening line: +305 — 5Dimes

Peak line: +765 — Bookmaker

Closing line: +765 — Bookmaker

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