1. Ronda Rousey vs. Holly Holm – UFC 193
We cap off our list with probably the biggest upset in the history of the sport of MMA.
UFC 193 was headlined by UFC women’s bantamweight champion Ronda Rousey and challenger Holly Holm, a highly decorated female kickboxing champion who was also undefeated in her MMA career.
Rousey was expected to run through the Jackson Wink product, as she typically does with any competitor who steps into the Octagon with her, but that was not the case on this night.
Holm went in with a great game-plan and utilized her superior striking ability and completely picked apart Rousey on the feet, visibly hurting her very badly.
‘The Rowdy One’ absorbed the damage for the first round, but couldn’t take anymore after eating a thunderous head-kick that would send Rousey down for the first time in her career in the second round.
Holm would be the second ever woman to hold the women’s 135-pound strap, and the first woman to defeat Rousey in her professional MMA career.