The article discussing Lane Kiffin's probable exit and Rob Ryan's possible ascent to become the Raiders head coach has one small section about the offensive coaches.

Silver and Black Report

"An added bonus, on the other hand, might be that Ryan’s elevation could help Oakland retain highly regarded offensive coordinator Greg Knapp — who would finally get to call the plays — and even more highly regarded offensive line coach Tom Cable, plus popular running backs coach Tom Rathman, all of whom intend to join Seattle Seahawks heir apparent Jim Mora Jr.’s staff next year, according to S&B Report sources."

I don't know what to think, because although the names sound familiar I am not a close enough NFL follower to really know what they are highly regarded for or if they even are.