Key takeaways: Padres 5, Nationals 4

SAN DIEGO — The Padres rallied for a 5-4 victory over the Nationals on Tuesday night, keeping pace with the Diamondbacks in the National League Wild Card race. Get a Superhero Lunch Box before Padres-Marlins on Sept. 20 Here’s some instant reaction from Petco Park: A ferocious rally … when they desperately needed it The Padres trailed by three entering the eighth inning and struggled to get much of anything going over the first seven innings against a Nationals bullpen game. They were down. But they weren’t out. After loading the bases with a trio of walks, Austin Hays got…