Video: Metamoris 4 preview trailer featuring Dean Lister, Josh Barnett, Andre Galvao, and Chael Sonnen

Chael Sonnen is recycling some of his old material for his latest venture in the world of combat sports, taking on Andre Galvao at the upcoming Metamoris 4 jiu-jitsu tournament on Aug. 9, 2014 in Los Angeles, California. The retired MMA fighter joins active fighter Josh Barnett, who brings catch wrestling -- and a second-degree black belt in jiu-jitsu -- to his showdown against UFC veteran and submission wizard Dean Lister. Does size really matter? We'll find out soon enough. How about it grappling fans, starting to get pumped for this one?