He was the great Mets pitching hope before Matt Harvey or Zack Wheeler. Jenrry Mejia was the young right hander the franchise was hoping would be the ace of the future before injuries derailed him. Friday Mejia may have pitched himself back into the Mets’ plans at least in the near future. He threw seven scoreless innings as the Mets pounded the Nationals 11-0 in the first game of a day-night doubleheader at Nationals Park. “I don’t know if we ever gave up on him but it is certainly easy to fall back in the pack with all the injuries” Terry Collins said of Mejia. “He was all the rage in 2010” the Mets’ manager continued. “Everybody thought this is the guy the sky is the limit. The injuries have set him way back. “Today he went out and showed there is no reason he shouldn’t be in the mix.” Mejia got plenty of help Friday. Daniel Murphy went 4-for-5 with two home runs driving in a career-high-tying five runs as the Mets (46-53) won their second straight. Juan Lagares went 3-for-4 drove in two runs and got on base four times. Ike Davis hit his first home run since June 2 — before he was demoted to and later returned from Triple-A Las Vegas — a three-run shot in the ninth inning off reliever Drew Storen. Both of Murphy’s homers came off Nationals starter Jordan Zimmermann (12-6) whom the Mets chased in the seventh inning. Zimmermann who entered with a 3.01 ERA allowed five runs on six hits and three walks. He ended the day with a 3.19 ERA. “It really started with Mejia” said Murphy. “He threw the ball so well today. To come up the first time this year the biggest thing was to just throw strikes and he was really pounding the zone and got some big ground balls.” Mejia scattered seven hits struck out seven and did not issue a walk.