3. Brock Lesnar vs. Frank Mir – UFC 100
When UFC 100 rolled around in 2009 it was the biggest card in the promotion’s history, and the main event was even bigger. Literally.
Frank Mir was coming off his second round knockout win over Antonio Nogueira at UFC 92, and securing the interim UFC heavyweight championship.
His rival Brock Lesnar was the reigning UFC heavyweight champion at the time after defeating Randy Couture at UFC 91 with a similar second round finish.
At the time Mir was the only man to have defeated Lesnar in his MMA career, when he caught the former World Wrestling Entertainment (WWE) star in a kneebar during their initial meeting at UFC 81 in 2008.
Lesnar wouldn’t make the same mistake twice, however, as he took Mir down and dominated for two rounds before the referee had seen enough and called it off.
The bitter feud wouldn’t end there, however, as Lesnar would trash talk the bloodied Mir rather than shake his hand.