HOUSTON It was tough to spot the contender over the weekend atMinute Maid Park, which doesn't speak well for the Giants . Their opponent is on pacefor a 108-loss season. But there is no mistaking Pablo Sandoval's All-Star swing. Sandoval delivered when nobody else could, sending a two-runhome run to the opposite field in the 11th inning that sent the Giants to a 6-4 victory over theHouston Astros Sunday afternoon.