Bud pretty much had say so over his staff, it was the offensive staff that was overhauled. I can only speculate but it was pretty obvious he didn't advocate for Cornell Brown at all, Brown tweeted about the candid feedback he got from Bud. Perhaps it was a similar situation with Gray. Back then I wouldn't think Fu would do have done anything that would unsettle the staff on that side of the ball unless Bud was okay with it.