SAN DIEGO For all the fretting over opening the season withoutBrian Wilson, the Giants didn't blow a save while their All-Starcloser was on the disabled list. The downside: They didn't have an opportunity. Madison Bumgarner got harassed in a 41-pitch third inningTuesday, the San Diego bullpen remained as protective as an attackdog and the Giants lost for the fourth time in five games after a3-1 defeat in the Padres' home opener at PetcoPark.