Rob Gronkowski's NFL Handcuffs Are Off & WWE Is Possibility, Says Mojo Rawley

[[tmz:video id="1_kht3peia"]] Rob Gronkowski is no longer "shackled" by the NFL and the New England Patriots -- and that means we could see him RUN WILD in the WWE very soon ... so says his good friend, Mojo Rawley. Everyone knows Gronk LOVES pro…