That goes a long way toward explaining why the Nationals are a contender and the Orioles own the worst record in the big leagues.
The game was essentially decided in the fifth inning, which began with Baltimore leading 4-1.
In the top half, the Orioles loaded the bases with no outs and scored only one run -- when Manny Machado hit into a 4-6-3 double play.
Washington loaded the bases with no outs in the bottom half and batted around, scoring four runs on four hits and a pair of walks. Adam Eaton contributed a two-run single, Rendon hit a sacrifice fly and Bryce Harper chased starter David Hess with an RBI double.
"They did a lot better job cashing in their bases loaded, nobody out situation than we did," Orioles manager Buck Showalter conceded.
For the game, Baltimore was 0 for 5 with runners in scoring position. The Nationals were 5 for 10.
"This team is starting to become relentless," manager Dave Martinez said. "They kept pounding and pounding and pounding, had a couple of big innings there and scored some runs."
The Nationals trailed 6-5 before getting six hits in a four-run seventh. Rendon delivered a two-run double off Tanner Scott (0-1) that made it 7-6, and Turner capped his four-hit night with a double.
Both teams noted that more than a couple of Washington's hits were bloopers and seeing-eye grounders, but the Nationals certainly weren't about to apologize.
"I feel like all year we've been hitting balls right at people," Turner said, "so it's nice to get a bunch of those in one game and come out with a win."
Washington has won six straight over its neighboring interleague rival, including four games this season by a combined 20-8.
Pitching in his second big league game, Nationals starter Jefry Rodriguez gave up five runs, four hits and four walks in five innings.
Justin Miller (5-0) pitched two innings of relief, newcomer Kelvin Herrera worked a perfect eighth and Sean Doolittle gave up a solo home run to Joey Rickard while earning his 19th save.
Jace Peterson and Trey Mancini each hit two-run homers for the Orioles, who have lost 16 of 19.
This one can be blamed on an all-too-telling fifth inning.
"It's just one of those things where if they got hits they seemed to have found holes," Showalter said. "They hit some balls hard, too."
MORE NATS NEWS: