Speaking of "the biggest upset in MMA history", remember when Kimbo got KO'd by Seth Petruzelli, at that time, EliteXC commentators said that was the biggest upset in MMA history

I agree that Fedor losing would be a bigger upset than Serra over GSP. Fedor is well known and has been around and on top, or close to the top for a long time. Rogers is not known and is not anywhere the top 10HW's.