On the way out was a man who managed for 29 seasons. On the way in was someone who hadn't managed any. Turns out, the decision to have hitting coach Don Mattingly replace four-time World Series champion Joe Torre as the Dodgers' manager was made official long ago — this spring, when Mattingly signed a contract that guaranteed him the job as soon as his mentor felt ready to move on to the next phase of his life. That time came Friday, when Torre, 70, announced he would step down when his three-year, $13.1-million contract expires at the end of this season.