David's last stand? Not yet.

There are two Giant Killers lurking in the Sweet 16, and it wouldn't shock us to see either one pull off another upset. Of course, at this point in what has been an incredibly topsy-turvy NCAA tournament, it probably wouldn't shock anyone to see anything. But our model detects specific reasons why these deepest of dogs aren't just rapidly emerging as fan favorites, but as teams capable of living to fight another day. Here are our previews of upcoming GK action.