... in the salary cap era, it doesn't take long for the strong to separate themselves from the weak.

Yet this year, that doesn't seem to have happened to the degree we might be used to.

What is most puzzling is that, going into Week Five, there were still five undefeated teams, a mark that's among the best in NFL history.

But despite what seems like a record pace, all but one of those teams—Indianapolis, Denver, the Giants, New Orleans, and Minnesota—have looked extraordinarily vulnerable in at least one of their early games.

Going undefeated through Week Five is nice and all, but it's a little early for the cracks to show, by normal standards.

The Colts, Broncos, and Vikings alone already have had to depend o...

Read Complete Article at Bleacher Report - NFL