#5 Ryan Bader vs Jason Brilz, UFC 139
Current Bellator Light-Heavyweight champion Ryan Bader earned a reputation as a dull fighter in his latter UFC days, but in reality, he started off as anything but dull, and reeled off a bunch of highlight-reel finishes in his early career inside the Octagon. Probably his best knockout was this one over Jason Brilz in 2011.
Bader was coming in off two straight losses – to Jon Jones and Tito Ortiz – and needed to win to keep his status as a hot prospect on track. Brilz had taken the likes of Rogerio Nogueira to the limit earlier in his UFC career, but his chin had been exposed by Vladimir Matyushenko in his previous fight.
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It was unsurprising then when Bader chose to keep the fight standing, and his gameplan paid off early in the first round. Surprising Brilz with his speed, Bader caught him with a rushing right hand to the temple, shutting out the lights and causing him to fall face-first. No follow-up was needed, as Bader had scored one of the best – and most unfairly forgotten – knockouts of his career.