The Arizona Cardinals' highest-ranking assistant coach, Russ Grimm, has drawn interest at times for head-coaching jobs in the NFL.
At the moment, losing Grimm isn't the primary threat to coach Ken Whisenhunt's offensive staff.
Miller replaced Jeff Rutledge, who was fired, not quite two years ago. He emphasized the little things, notably mechanics, when working with Kurt Warner.
Mechanics became a bigger point of emphasis when Derek Anderson took over as the starter in 2010. Anderson's mechanics led to accuracy problems that lingered throughout the season.
Players tend to revert to bad habits under pressure and it's tough for even skilled quarterbacks coaches to fix significant problems with mechanics.