I never said ring or octogan. I said fight. Put them in the middle of a feild with no foreign objects, I guarantee a Mixed Martial Artist would win.

Pride 31 - Mark Hunt - Great MMA striker vs. Yosuke Nishijima - former WBC cruiserweight champion.

Striker vs. Striker.

The result? MARK HUNT BY TKO DUE TO STRIKES!

Vitor Belfort used to be a top ranked boxer, AND a top ranked mixed martial artist AT THE SAME TIME

Joyce Gracie dominated boxers at the first UFC (no holds barred - basically street fighting) using nothing but the art of BJJ

As I said before. For most boxers, it's the only type of fighting they know. Their stance requires their (usually) left leg to be open for a takedown, but in the boxing ring, you don't need to worry about that.