M.J. Stewart's Maturity Solidifying his Potential Posted Jul 27, 2017 While M.J. Stewart’s ability on the field has never wavered, his true growth has occurred in the form of self-discipline and accountability. It’s a talking point in numerous phone conversations with his father and it’s become the basis for his ascension into a leadership role for the 2017 Tar Heels. “He’s matured so much in his time at Carolina,” Larry Fedora said. (Inside Carolina)