Strictly speaking, a Giant Killer is any team seeded at least five lines lower than the NCAA tournament opponent it beats. That definition allows plenty of room for teams seeded in the Nos. 6 to 9 range to live up to the GK label.
Today, however, I want to really get into the David vs. Goliath spirit of this feature and look at teams that could be dangerous in March even though they're likely to receive double-digit seeds. Working, as always, from my colleague Joe Lunardi's latest and greatest bracket projections, here are four teams that could bring the mayhem from the double-digit-seed lines.