Ralek and Rener Gracie are back with another Gracie Breakdown. In this edition, the brothers look back at UFC 137. They get inside the grappling techniques used by Roy Nelson when he had side mount against Mirko Cro Cop. They also briefly talk about Nick Diaz and his ability to escape the back mount position in his fight with BJ Penn at UFC 137. This is great stuff for all you grappling fans.

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