Sunny Jerguson Seahawks Piping In Sound

[ArtMonkDrillz]

Originally Posted by Mattyk72

It's a lot easier to make defensive adjustments (hand signals) than it is for say the center to try to verbally communicate blocking assignments to the rest of the line.

that's pretty much why.
Plus, the D is allowed to move around prior to the snap so, for example, a linebacker is free to move up to a DT to tell him to move over to a different gap.
There's also the fact that it's their home field, so I'm sure they're more used to working in that environment.