In Fox's absence, defensive coordinator Jack Del Rio has taken over as interim head coach of the Broncos, while fellow D-coordinator Wade Phillips is filling in for Kubiak in Houston. Del Rio and Phillips both make perfect sense in interim roles, as you like having someone who's been a head coach in the NFL and won't be fazed by the novelty of the experience. Also, there's a case to be made that it's easier to step into the job on short notice if you're on the defensive side of the ball. After all, most of the either/or decisions a head coach must make -- Go for it or punt? Go for it or kick a field goal? Extra point or two-point conversion? -- crop up when the offense has the ball. Jack coached with me in Baltimore, and he's smart -- he'll know that his job is not to alter the plan, but merely extend what John Fox already has in place.