You watch, if Pats catch the Ravens in the hurry up, Ray Lewis is going to be tackling Hernandez/Welker from behind until they can get his ass on the bench and let Ellerbe take his place.
He is the only linebacker they have who can cover and he's pretty damn good at it.
With gronk being out , I think we might have ellerbe shadowing hernandez (although ray has looked a faster in pass coverage), and might just take the chance with the run by using nickel with welker.