Does Chael Sonnen stand a chance?

Obviously, everyone has a chance, otherwise the fight wouldn't be worth paying for.  And Chael probably will fare the best of all recent fighters to take on Anderson Silva.  But what do the odds really stand at?  Our best indicator is probably the betting odds, which are no doubt inflated to Sonnen's favor due to the amount of trash talk lately.  The highest percentage chance I've seen a gambling site have for Sonnen so far was a 22.5% chance of him winning.  The Lowest, you ask?  11% chance =)