Disciplinarians generally have short shelf lives in professional sports.
Even good football minds like Parcells would generally wear out his welcome within 2-3 seasons.
Being a red ass as a coach is overrated anyway and unless you have credibility (i.e. Super Bowl rings) it usually backfires sooner rather than later.
this is true, but there is an always exception to the rule (i.e. coughlin, belicheck)