If the Mets can get this kind of production from the top, they might not be destined for the bottom. Eric Young Jr. and Daniel Murphy were a lethal 1-2 combo at the top of the order Thursday night, reaching base seven times between them to inject life into a previously dormant Mets lineup. Young — with three stolen bases — brought the speed element and Murphy cleaned up with three RBIs in the Mets’ 6-4 victory over the Braves at Turner Field. In a sloppy game that included Curtis Granderson losing a ball in the lights to lead to a Braves outburst, the Mets persevered. In the end, Carlos Torres, Kyle Farnsworth and Jose Valverde combined for four scoreless innings of relief to secure the rubber game of the series. Murphy went 3-for-4 with a walk and stolen base. Young was 3-for-5 and made his speed count even when he wasn’t stealing bases — he legged out a fielder’s choice in the eighth and eventually scored the Mets’ final run on Murphy’s RBI double. Juan Lagares delivered the go-ahead run in the seventh with an RBI single against Gus Schlosser that gave the Mets a 5-4 lead. Ike Davis had failed to push across the runner from third moments earlier, popping out against Luis Avilan, before Lagares came to the rescue. Jenrry Mejia survived a rough outing in which he allowed four earned runs on six hits and four walks over five innings. That followed a shaky start by Zack Wheeler a night earlier, in which the right-hander allowed four runs over five innings. Murphy’s RBI single in the fifth tied the game 4-4, but the Mets squandered a big opportunity to take the lead. Anthony Varvaro entered a bases-loaded jam and struck out Lagares before Travis d’Arnaud was retired to end the inning. Young’s third hit of the game, a leadoff triple, started the rally.