Never underestimate your opponent. 10 to 15 years ago it wasn't that rare to see your favorite Pride or UFC fighter rolling around in jiu-jitsu tournaments. In 2015, it is kind of a rare occurrence for full time UFC athletes to put themselves out there on the BJJ mats in a tournament format.
Former Ronda Rousey victim and 2004 Olympic silver medalist in wrestling, Sara McMann was on the wrong end of an upset at a recent Kakuto Submission jiu-jitsu challenge event. In the open weight division tournament McMann was paired with 16 year old up and comer Alexandria Enriquez.