Have you noticed all the no-calls on targeted helmet to helmet hits? Pac-12 coaches are not allowed to speak publicly about missed calls during games by the referees. If they do they will most probably be fined. When Isaiah Hayes got clobbered in the head at the end of a play in the Cal game, the referees somehow determined that the helmet to helmet hit that Hayes took and almost knocked him unconscious was not targeting.
Kevin Sumlin was asked in the press conference following the game about this call and he basically reiterated that he would be punished if he spoke about it.