The defending champion Green Bay Packers were heavy favorites going into the postseason, but their run ended unexpectedly last weekend, leaving the door open for any one of the remaining four teams.

Does Tom Brady have another Super Bowl run in him or do the Ravens have the defense to deny him another shot? Will Eli Manning get another shot at a ring or will Alex Smith get his first? We take a look at both of this weekend's match-ups and offer a prediction on each. Read our conference championship previews...

Which stadium was the first Super Bowl played in? Which city hosted the first Super Bowl north of the Mason-Dixon Line? Name the player who has played on the most winning Super Bowl teams.

If you're a trivia buff, you'll enjoy this collection of 10 trivia quizzes designed to test your Super Bowl knowledge. Several of these trivia quizzes focus on a particular theme, such as records, MVPs, and stadiums, while others mix it up with a variety of general Super Bowl Trivia. We also have the resources to explore the history of the Super Bowl, including results of all the games, all-time Super Bowl standings, National Anthem performers, and a whole lot more!

It's always a challenge to compare players from different eras, but there's no way around it when compiling lists of the NFL's greatest of all time. Stats only tell part of the story because of the way the game has evolved over the years. And because of that, opinion becomes a major factor when assigning these types of rankings. Chances are, however, no two fans are going to agree completely on any top ten list, so we don't expect all of you to agree with ours. Who knows, maybe none of you will.

So feel free to offer your take in the comments section below (and maybe post your own list) after you get a look at our list of the top ten running backs of all time!

With the NFL playoffs getting underway, we've put together some interesting notes regarding this year's participants:

• For the tenth time since 1996, at least half the playoff field is made up of teams that failed to qualify for the postseason the previous year.
• Since realignment in 2002, 31 of the 32 NFL teams have qualified for the playoffs at least once. The lone holdout... the Buffalo Bills.
• Six of this season's 12 playoff teams have won at least one Super Bowl since 2000. Those six have also won nine of the past 11 championships.
• Three teams in this year's playoff field -- the Houston Texans, Atlanta Falcons, and Cincinnati Bengals -- have never won a Super Bowl.
• Since the NFL adopted the 12-team playoff format in 1990, only nine No. 1 seeds have been crowned champions.
• The Pittsburgh Steelers have not allowed a 100-yard rusher in 17 consecutive postseason games, which is tied with the Washington Redskins for the longest current streak.
• There are seven players in the 2011 postseason who have been named Super Bowl MVP: Tom Brady, Deion Branch, Drew Brees, Ray Lewis, Eli Manning, Aaron Rodgers, and Hines Ward
• This is the first postseason in NFL history to feature four Super Bowl MVP quarterbacks.