This is Backlash, aka Brandon Calhoun (aka Chris Hemsworth). He's an Aussie who came to America for college and got involved in the college basketball world. If not for his powers manifesting when he was around 23, he would have gone on to become a professional player. Instead, Brandon was arrested, taken into custody, trained, and eventually ended up on Alpha Team as Tank #1. His ability involves absorbing the kinetic energy directed at him and using it to change things about himself: a conscious spin on reactive adaptation. These changes are not permanent, and will last only as long as he can absorb enough kinetic energy to sustain them (or he consciously lets an adaptation go to conserve energy).