On Monday, Tony Dungy began the transition from head coach to full-time dad and devoted volunteer by announcing his retirement after seven years leading the Colts, according to an Associated Press report. ?We just felt this was the right time,? Dungy said. ?Don?t shed any tears for me. I got to live a dream most people don?t get to live.? The move triggered a succession plan put in place a year ago, making Jim Caldwell, the associate head coach, Dungy?s replacement.