Dan Haren is done after six innings of work this afternoon, and if not for two mistakes that turned into home runs, the veteran right-hander might've turned in a pretty strong outing. As it is, it will still officially go down as a quality start, but Haren and the Nationals trail 3-0 in the sixth. Haren gave up a two-run bomb to Giancarlo Stanton in the first inning on a 90 mph fastball over the fat part of the plate, and two innings late, it was Christian Yelich crushing an 85 mph cutter...Dan Haren is done after six innings of work this afternoon, and if not for two mistakes that turned into home runs, the veteran right-hander might've turned in a pretty strong outing. As it is, it will still officially go down as a quality start, but Haren and the Nationals trail 3-0 in the sixth. Haren gave up a two-run bomb to Giancarlo Stanton in the first inning on a 90 mph fastball over the fat part of the plate, and two innings late, it was Christian Yelich crushing an 85 mph cutter right down the middle for a solo shot. The fastball to Stanton was on a tee, and the cutter to Yelich didn't cut. The two home runs give Haren 28 longballs allowed in his 29 starts this season, tied for fifth-most in the majors. Despite the home runs, the Nats are still very much in this game, although they haven't been able to muster much of anything off Marlins right-hander Tom Koehler. The Nats have just two hits through five innings this afternoon, both of which were singles. After each single, the following batter grounded into an inning-ending double play. Koehler came into today with a 3-10 record and a 4.51 ERA. But he's befuddled the Nats so far today. Update: The Nats finally got to Koehler in the sixth when Ryan Zimmerman smacked a two-run homer to the red seats in left center, cutting the Marlins' lead to 3-2. It's Zimmerman's 26th homer of the season, extending his team lead. Denard Span drew a two-out walk to keep the inning alive, and Zimmerman got the barrel to a 2-1 fastball. In 20 games this month, Zimmerman has 11 homers and is batting .333/.385/.738. What a finish to the season he's having. Update II: Ryan Mattheus came on for the seventh inning, faced three batters and allowed a big insurance run. He allowed a leadoff single to pinch-hitter Juan Pierre (which shockingly moved Pierre past Joe DiMaggio on the all-time hits list with 2,216). Pierre then stole second base. He then moved to third on a wild pitch. Mattheus walked Chris Coghlan, and then Donovan Solano hit a sac fly to left to bring in Pierre and make it 4-2 Marlins. Not what manager Davey Johnson was looking for from Mattheus. A loss this afternoon would be crushing for the Nats' already slim playoff hopes. Cincinnati currently has a 7-3 lead over Pittsburgh in the sixth, and a Reds win combined with a Nats loss would leave the Nats 5 1/2 games back of both NL Central teams going into the nightcap of tonight's doubleheader at Nats Park. Update III: That'll do it. The Nats fell to the Marlins 4-2 in game one of today's doubleheader. They were out-hit 12-4 and outside of Zimmerman's two-run homer in the sixth, they failed to get a runner into scoring position all game. With the loss, the Braves have clinched the NL East title. If the Reds-Pirates score holds, the Nats will be 5 1/2 games back of both teams going into tonight's game.