Former WWE professional wrestler CM Punk speaks at a press conference following UFC 181 after signing a contract with the UFC Saturday, Dec. 6, 2014 at the Mandalay Bay Events Center. (Sam Morris …

Former WWE professional wrestler CM Punk speaks at a press conference following UFC 181 after signing a contract with the UFC Saturday, Dec. 6, 2014 at the Mandalay Bay Events Center. (Sam Morris/Las Vegas Review-Journal)