If Strikeforce middleweight Ronaldo Souza gets his hands on an adversary there’s a good chance a submission will be locked up shortly thereafter. “Jacare” is one of MMA’s top grapplers and BJJ wiz, posing a threat to any foe on the ground.

In the following clip, Souza teaches viewers how to lock up an Armbar when in mount…

PHOTO CREDIT – STRIKEFORCE