Indianapolis Colts Coach Tony Dungy to Retire

Indianapolis Colts coach Tony Dungy will announce his retirement today, bringing to an end a coaching career that saw him win 148 games and a Super Bowl.

Jay Glazer of Fox Sports reports that Dungy has already started making the rounds at the team's headquarters to say goodbye to players and other team employees.

The formal announcement will be made today at 5 p.m. Eastern. Dungy's longtime assistant Jim Caldwell will be introduced as the Colts' new head coach, and Dungy was reportedly motivated to retire now in part because he wanted Caldwell to inherit a strong team.

Although the 53-year-old Dungy is young enough that he could return to the game, all indications are that Dungy is done coaching for good. Dungy has said he would like to do other things with his life -- including starting a prison ministry -- and that when he walks away from the Colts, he's walking away from football forever.