The last time the Chiefs and Patriots played was in Week 4 of last season on Monday Night Football, when the Chiefs dismantled the Patriots 41-14 at Arrowhead. Tom Brady threw for just 159 yards with 1 TD and 2 INT, the second of which was returned for a TD by Husain Abdullah. Jamaal Charles scored 3 TD, and Brady was replaced by Jimmy Garoppolo in garbage time. Postgame, Bill Belichick said the Patriots were "on to Cincinnati."

Bill Belichick and Andy Reid will face each other in the playoffs for the first time since Belichick's Patriots defeated Reid and the Eagles in Super Bowl XXXIX. It will be the 8th rematch of opposing Super Bowl head coaches in a playoff game, with the winner of the Super Bowl winning 6 of the 7 rematches. Belichick is 1-2 in such rematches (1-1 vs John Fox and 0-1 vs Tom Coughlin).

The Chiefs became the first team in NFL history to start 1-5 and win a playoff game. The only other team in NFL history to even make the playoffs after a 1-5 start was the 1970 Bengals, who were shut out 17-0 by the Baltimore Colts in their first playoff game.

The Packers-Cardinals game is a rematch from Week 16, when the Cardinals handed Aaron Rodgers the worst loss of his career -- a 38-8 drubbing. The Cardinals sacked Rodgers 8 times and the Packers generated just 178 yards of offense in the loss.

The Cardinals are 4-0 in home playoff games all-time, making them the only current NFL franchise never to taste postseason defeat at home.

The Seahawks are 4-1 against the Panthers (including playoffs) since 2012, with Carolina's only win coming in Week 6 of this season (27-23). However, 4 of those 5 games have been decided by 5 points-or-less.

In the last 7 games of the regular season, Russell Wilson and Cam Newton combined for 49 TD (44 pass, 5 rush) and just 2 INT. Wilson was responsible for 25 TD (24 pass, 1 rush) and 1 INT, while Newton had 24 TD (20 pass, 4 rush) and 1 INT.

Russell Wilson's career-best playoff game came the last time he faced the Panthers in the postseason. Wilson had 3 TD, 0 INT, and a passer rating of 149.2 (all career bests) in the 31-17 Divisional Round victory.

The Steelers-Broncos game is a rematch of the 2011 Wild Card Game that saw Tim Tebow beat the Steelers in overtime with an 80-yard TD pass to Demaryius Thomas. That game is the lone blemish on Ben Roethlisberger's road playoff resume, as he's won his other 4 career road games in the postseason.

If Antonio Brown is cleared to play, he has a chance to do some things no NFL player has ever done. Including playoff games, Brown is 7 receptions shy of 150 for the season, and 47 receiving yards shy of 2,000. No player has hit either milestone in a single season before.