Ronda Rousey could easily stand to learn a thing or two from BJ Penn. He's one of the greatest grapplers to ever do it, and she more than held her own while practicing with the GOAT himself recently.
Take a look and see the two get after it below...
Are you looking forward to a Holly Holm and Ronda Rousey rematch. And if it goes down, who takes it?
(Via: Daily Motion)