Velasquez responds to Fury. Speaking to ESPN, UFC heavyweight champion Cain Velasquez responded to the persistent challenges of heavyweight boxing contender Tyson Fury. Said Velasquez: "I'm not a boxer. I'm a mixed martial artist, and if he wants to fight, he can go into the UFC and work his way up like everybody else does. Nothing is given to you in this world. ... Don't talk about it, go ahead and do it."