I live just north of Indy, so "will Dungy stay or will he go" has certainly been all the buzz in the local media since the Colts lost in the playoffs. Dungy's family moved back to Tampa a year or two ago, and the separation has reportedly been difficult. Dungy has also said he would like to focus on charity work as well as having more family time. I would imagine that the team's failure to live up to expectations in the postseason the last two years came into play as well.
I do not follow football (but have a husband who does), so I can't offer much more than what has been said the last few days on the local news. They did say this morning that if Dungy chose to leave, his replacement is already in place--an assistant head coach, although I couldn't tell you his name.
Dungy has been a great asset to Indy, not just in football. He will be missed in the community.
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If ignorance is bliss, there ought to be more happy people.