For the first time in the league's 90 seasons, three games in the same round of the playoffs will be played indoors. The New Orleans Saints will meet the Arizona Cardinals in the Louisiana Superdome, the Indianapolis Colts will play host to the Baltimore Ravens and the Minnesota Vikings will entertain the Dallas Cowboys.
The only game to be played outdoors will be in San Diego, where the National Weather Service calls for a 20 percent chance of rain Sunday when the Chargers face the New York Jets.
New Orleans averaged 403 yards per game during the regular season, which the Saints ended with three straight losses. They will take on an Arizona team that last week won the highest-scoring playoff game in NFL history -- a 51-45 overtime decision over Green Bay.
Another offensive slugfest is expected and if the Saints win it, they will move within one victory of their first Super Bowl appearance.
Indianapolis is the only team remaining in the playoffs to have won a Super Bowl during the last eight years. Baltimore has already won a playoff game on the road this season, having disposed of New England last weekend.
Dallas quarterback Tony Romo will face off Sunday against the player he grew up idolizing -- Minnesota's Brett Favre. The Cowboys are coming off their first post-season win in 13 years.
San Diego will take an 11-game winning streak into its game with the Jets.