The Patriots have added Corwin Brown to the coaching staff. Corwin was the defensive coordinator at Norte Dame with Chaz Wies. Corwin also has NFL experience, he coached the secondary in New York with the J-E-T-S. He played there for two years when BB was coaching in the late 90s.
Brown will most likely be working with the defensive backs which were a big weakness this year. They are also extremely young and inexperienced, with Browns playing experience he might be able to relate to the young ins. Last season Dean Pees was working with the DBs but now has departed for the Ravens which is why there is a hole at DBacks coach (Josh Boyer also works with the DBs)
Corwin seems like a good young coach. While Norte Dame’s defense struggled, I still think Corwin can bring something new to the Patriots staff. He has playing expirence with BB, so he knows that BB expects from his secondary.