Kamaru Usman has proven knockout power, but Teddy Atlas doesn’t think he’d fair well in a boxing ring. UFC welterweight champion Usman has been unstoppable in the octagon and his striking has improved leaps and bounds his past few fights. Usman scored knockouts in three of his past five wins and his confidence is so high that he issued a challenge to undisputed super middleweight boxing champion Canelo Alvarez. Legendary boxing trainer Atlas lauds Usman (20-1 MMA, 15-0 UFC) for his ability to mix things up in the cage, but doesn’t like his chances against Alvarez or even a mid-level boxer for that matter. “He’s got physicality, he’s very strong, he’s a decent puncher and he’s not a bad striker – although I think a lot of his strengths are on the mat with his knowledge there and his physicality,” Atlas said in an interview with The Schmo. “You throw him in there with a B-level guy or even a good journeyman guy, no