Plenty of change in the air -- just not at head-coaching level

Even with a fairly impressive contingent of candidates available to NFL teams, this might not be the best firing-and-hiring cycle for assistant coaches who are perceived to be hot commodities.

Job prospects in any walk of life, particularly those involving significant vertical mobility, generally revolve around the basic principle of supply and demand. At this early juncture of the league's annual turnover period, the supply of qualified candidates for head-coaching vacancies far outdistances what appears to be very basic demand.