You could tell by the look on his famously bearded face that Houston Rockets superstar James Harden was locked in, ready to put in work with that lethal left hand of his that’s virtually unstoppable when Harden gets on a roll. And during a recent signing session with Panini America, Harden got on a serious roll. He scored all afternoon long — every two or three seconds it seemed — and never once so much as even touched a basketball.