Goliaths beware! We're baaaack ...

Updated: March 9, 2011, 11:41 AM ET
By Peter Keating

As we launch the sixth edition of Giant Killers, we'd like to welcome you back to another hunt for shocking NCAA upsets and guide you through the methods to our March Madness.

So if you're wondering what Giant Killers are and how we find them, please check out this explanation of our methodology (which is free), as well as this introductory article from the latest issue of ESPN The Magazine. For a deeper exploration of how and why teams pull off big upsets, you can also check out this older Mag piece, too.

Over the years, we've learned a lot from and had a lot of fun with reader feedback. If you have questions, comments, complaints or ideas, hit up the GK Mailbag and let us know.

As we did in 2010, we have assigned potential Giant Killers a score from 1 to 100 based on how statistically similar teams are to previous Killers. Any score of 50 or higher means a team stands a very strong chance of pulling off an upset, while a score of less than 5 means a team bears basically no resemblance to underdogs who enjoyed success in the past. Similarly, we have assigned vulnerability ratings to this year's Giants on a 100-point scale. In the coming days, we will be rolling out these scores for Killers and Giants. And once the NCAA selection committee seeds the tournament, we'll provide our predictions for head-to-head matchups, too.