I know that I am late to the game here, but how could you not count the California Angels coming back to beat the vaunted Barry Bonds led 2002 Giants in game 6 of the World Series? Game 7 was anticlimactic compared to the unbelievable win in game 6. My hometown Angels finally won their 1st World Series after waiting 40 years.
The Angels made it to the Series as a wild card underdog, much like the 2011 Cards. It doesn't get much better than that. Who didn't think before this World Series started that Texas would be the eventual winners?