—New England: The Pats are as close to perfect as there is, but they, too, have blemishes, including RB Stevan Ridley's fumbles. Despite rushing for a career-high 1,263 yards and 12 TDs in his second season, Ridley fumbled four times, putting him in line for one of coach Bill Belichick's notorious rants.
"We're trying to play perfect football. That's impossible, of course," Ridley said. "But when you make a mistake, you best believe that this is one place it's not going to slide."
—Houston: The Texans lost three of their last four and the main culprit is third down travails. They've converted just 15 of 49 third-down attempts in their last four games and their defense has been unable to make stops. Andrew Luck threw a 70-yard touchdown pass on third-and-23 in the fourth quarter Sunday to put the game out of reach.
"Hopefully, being at home, the noise, all those things, we can do a better job," said coach Gary Kubiak.
—Baltimore: Surprisingly, the Ravens' weakness is their defense. Baltimore has long relied upon this unit to win, but this season they've battled injuries (Terrell Suggs, Ray Lewis, Lardarius Webb and Bernard Pollard), and Ed Reed is having an average year. And Lewis will pull off his No. 52 jersey for the last time after the Ravens lose or claim their second title.
"Everything that starts has an end," Lewis said Wednesday in announcing his retirement.
—Indianapolis: Youth. The Colts hit the road with the worst turnover margin of any team in the playoffs (minus 12), the fewest takeaways (15) and the least experienced team. More than two dozen players, including Luck, will get their first taste of the playoffs Sunday at Baltimore. They've also been much better at home than on the road.