Darren Rizzi’s presser: “I’m an accountability guy. We’ve been doing things the same way here for a long time. Change is needed.”

Can anyone think of any successful head coaches that were primarily special teams coordinators outside of John Harbaugh? This isn't a knock on Rizzi just can't think of anyone other than Harbaugh.

On the surface it makes since to me though. He's less involved with offensive and defensive game plans and play calling and the ratio from offense/defense snaps to special teams snaps leaves him more available even if he's involved in his forte leaving him more time to actually take on the responsibilities of being a head coach.