Isabella: How much is a First Class stamp? megalis 10 benefits Rivera, 43, announced his retirement before the start of the 2013 season, and is being feted Sunday. Pettitte is scheduled to start that game, the series finale against San Francisco. After Sunday's game, Pettitte, who is 10-10 this season, is scheduled to make one more start in Houston, where the southpaw defected for three seasons (2004-06) sandwiched in between his two stints with the Yankees.