There have been 180 playoff teams in the 15 seasons since the NFL went to a 12-team playoff format (1990-2004). Of those 30 Super Bowl slots, 25 of them have been claimed by either first or second seeds, who get a first-round bye and a divisional-round home game. The other five Super berths were won by either a No. 3 seed (once, Carolina in 2003), or a No. 4 (four times, notably by Denver in 1997 and Baltimore in 2000, when both were wild-card entries that got a first-round home game in the old six-division alignment).A fifth or sixth seed has never made it to the Super Bowl in the 12-team format, and only two (1995 Colts and 1996 Jaguars) even stayed alive to the conference championship round. That's why the Jaguars, Steelers, Panthers and Redskins are going to have to buck history to make history.