Gracie: CM Punk is interested in MMA and there’s ‘no limit’ to his potential

Updated JAN 30, 2014 12:14a ET CM Punk in MMA? It might not be as unrealistic as you think. Rener Gracie, who has trained the WWE star for the last four years in Brazilian jiu-jitsu, said Punk has told him he would be interested in competing in mixed…