Favorites and underdogs are picked by who bookies think people will bet on, not who is actually better. Sometimes you get wacky odds if a lesser known but superior fighter is facing off against a well known opponent. The face recognition person gets the odds set in his favor purely because people will bet on him on a basis of knowing their name. That's not the case here but is somewhat similar - Nog and T. Silva were both coming off horrible looking performances. Nog looked half dead against Mir and Silva got messily devoured by Machida. So the bookmakers looked at that and thought that most people would bet against those guys. And of course people are going to go for Randy. No explanation on Jardine though, people just like that goofy looking guy, I guess.