I think Cowher likes attention from the media, so he keeps the door open. Maybe a ridiculous offer will bring him back, but if that what it would take, how much is his heart really into it ? I at least believe that Marrone works hard.
Plus, how many coaches come back after such a long absence and are successful? None.
Harbaugh doesn't seem likely, somehow.
I'm wondering about assistants and college coaches. I don't expect Gruden, Harbaugh, or Cowher.