Far from it, off the top of my head I can name guys like Chuck, Overeem, Arlovski, Goulet, and James Thompson who have been flatlined just as many or more times and in some cases in more highlight reel fashion. That being said, if I'd been told years ago, like after the Maynard fights, that someone would even halfway seriously put Edgar in a discussion like this I'd have thought it ridiculous but Father time is undefeated and this is the typical end of the career cycle of a pro fighter. It sucks that it goes this way but the very things that make a great fighter, namely insane self-belief and a refusal to accept defeat are what lead to these ignominious endings.