Bump.

Again, kudos to Maxie for digging up this info.

Its clear a lot of teams (Packers included) are trying to get more athletic and this kind of ranking helps explain what they are doing what they are doing.

As 3itry1 opines, as offenses get weirder and more pass whacky, the athleticism of your defense becomes more important. Because you aren't holding up a wall at the front of the defense, you are chasing players across the width and depth of the field.