Vitor Belfort nearly sent Las Vegas bookies into a panic attack when he secured an armbar on champion Jon Jones on Saturday night. With Jones coming into the fight as an 8:1 favorite, anyone who dropped a courtesy bet on Belfort almost cleaned up.
Unfortunately for fans of The Phenom, Jones was able to escape the deep submission and pull out the victory only three rounds later. Some betting favorites weren't so lucky.
Here is a look at the biggest upsets from UFC 152, power ranked based on betting odds at fight time.