From Cold Hard Football Facts. Check out the entire piece on this link.

Four weeks into the season and five teams stand at 4-0. That’s a pretty daunting number.

Even more daunting may be the fact that the 4-0 New England Patriots, Denver Broncos, Kansas City Chiefs, New Orleans Saints and Seattle Seahawks all hit the road this Sunday.

So how many of those five teams will be chasing perfection by weekend’s end?

It’s just one of many fascinating storylines as the NFL season heads into October.