When Jon Gruden’s name first emerged as the potential head coach in Oakland, an immediate concern emerged: Would Gruden and quarterback Derek Carr coexist? The thinking was that Gruden would morph into Chucky, ranting and raving and cussing and generally wearing out Carr, who may not be able to take it. Gruden tried hard in the offseason to create the impression that he won’t take an over-the-top approach to his relationship with Carr, if Gruden believes that Carr won’t respond well to that approach.