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Former UFC featherweight champion Jose Aldo is a jiu-jitsu black belt who recently made his return to competing in the gi.The Nova Uniao black belt, who once won the jiu-jitsu world championships as a purple belt, recently took to the mats for a superfight against a very special opponent in Rio de Janeiro.Aldo met Jonathan "Pitbull," a purple belt with Down syndrome, in front of a loud and very appreciative crowd -- and you can see the results for yourself in the video below.[facebook url="https://www.facebook.com/sjjsaf/videos/1327477970698180/"]Don't miss breaking news, feature stories, event updates, and more. Sign up for the FloGrappling mailing list today.