Any time a monumental upset takes place in mixed martial arts, it’s pretty much mandatory to start up the discussion about where the fight falls on the list of biggest upsets of all time.
With Fabricio Werdum‘s Strikeforce win over Fedor Emelianenko on Saturday, the debate began as soon as the shock of seeing Fedor tapping out wore off: Was this the biggest upset in the history of the sport?
This is just one Top 10 list. Yours will likely differ in inclusions, snubs and placement. There have, of course, been plenty of other notable upsets beyond this set, some of which are listed here as Honorable Mentions. But like unofficial pound-for-pound lists, big upsets like Werdum over Fedor are a part of what keeps MMA fans debating. So let the discussion begin.