In our Giant Killers tour of the NCAA tournament regions -- which previously included the East and West regions -- we finally hit a bracket bubbling with upset potential. If the Goliaths fall right, we could even see a 12-seed and 13-seed square off against each other here in the second round. Now, that would short-circuit our spreadsheets.
4hPaolo Bandini, Special to ESPN.com
5hXin Wan, ESPN China