Sorry, but Charles Woodson no longer belongs on that list, and anyone who says he does is still stuck in last year. The guy is still good, but he's basically a nickel corner for Green Bay this year, and he's been inconsistent at that.
I can't take Revis away because the man is just dominant. Nnamdi hasn't really done it statistically this year, but I'm sure many are going to say that's because teams are staying away from him. Asante makes plays on the ball when he's on the field but oft-injured. The man still won't tackle to save his own life. That makes him an incomplete corner.
I'll take McCourty in the top three. He tackles better than pretty much anyone on the list except for Woodson (I'll still give him that). He covers well in man and zone. He's smart, has speed and quickness, and is just always around the ball. I don't know the actual stat, but I'm willing to say he's among the leaders among corners in tackles behind the LOS. Oh, and he plays ST to boot. The guy is just a complete corner and belongs in the top three.