No, Overeem was on an 11 fight win streak and hadn't lost since what? 2007 or something? He is handily winning this fight and then gets caught. I doubt he is anywhere near in need of retirement.
Sig Credit: M.C
Miesha Tate - Urijah Faber - Dustin Poirier - Frankie Edgar - Claudia Gadelha - Demian Maia - Jessica Eye