By Andrew Gould The San Diego Padres have their backs against the wall. Despite jumping out to a 4-0 lead in the top of the first inning, San Diego suffered a 10-6 loss to the Philadelphia Phillies on Saturday night. Now down 3-1 in the NLCS, the Padres face elimination entering Sunday afternoon’s Game 5. Although they’re in a perilous situation, Blake Snell believes the Phillies should actually be more nervous. “All of the pressure is on them,” Snell said, perUSA Today’s Bob Nightengale. “We know they don’t want to go to San Diego.” If the Phillies can’t finish the Padres on Sunday at Citizen…