Padres take hold of 2nd Wild Card spot with Salas’ walk-off hit

SAN DIEGO — It’s starting to feel and sound a lot like the postseason at Petco Park. You could hear it when Fernando Tatis Jr. clobbered a game-tying home run to center field in the fourth inning against the Marlins on Saturday night, swaggering around the bases to a chorus of raucous cheers from a packed house. Get a Superhero Lunch Box before Padres-Marlins this Sunday! You could hear it when Ethan Salas laced a single into center field to score Jake Cronenworth in a 7-6 walk-off win over the Marlins, the 20-year-old practically launching the crowd to its feet…