(4) Houston Texans

The Texans are the only team left in the playoffs this year to have never played in the Super Bowl. In fact, they're the only team in the NFL that has yet to appear in a conference championship game.

Houston hopes to change that in the next few weeks, and you have a chance to be a part of it as an honorary Texans fan. There are plenty of attractive reasons to break out the navy and red in your wardrobe, and orange actually has a lot to do with it. Two of the Texans biggest stars are familiar faces in the Carolinas, and that's because Houston is led by Clemson standouts Deshaun Watson and DeAndre Hopkins.

This could be a make or break factor in pledging your allegiance. Either you're a fan of the duo from their college days, which makes it an easy choice, or Watson and Hopkins wronged your local college team of choice and you've been holding a grudge ever since.

If you need more convincing, Vegas has the Texans listed as the longest of the long shots, so if you're going to pull for an underdog, why not choose the biggest of them all?