1700 1 March 13, 2006^1:36pm Reedster^1 Piazza hits grand slam off Armando Benitez in his first spring game sportsillustrated.cnn.com/2006/baseball/mlb/specials/spring_training/2006/03/12/padres.piazza.ap/index.html Padres si.com 1483 2565 0 &box-Mike Piazza is ready to start really getting to know his new San Diego teammates, and he's ready to produce at the plate. Piazza hit a grand slam in the fifth inning for San Diego in a 10-6 win against the San Francisco Giants on Sunday in his first Cactus League game after competing for Italy in the World Baseball Classic.-box& Unfortunately, it wasn't in Petco Park, which will be the real test.