Washington Nationals rookie pitcher Tanner Roark wanted to keep going. He had thrown 101 pitches -- 23 more than he'd ever thrown in a single game -- but still wasn't ready to call it a night. "I said, 'Nice game.' He said, 'You sure I'm through?' " Nationals manager Davey Johnson said as he began to smile. "I said, 'Yeah, you're through.' " Roark was through, but Washington certainly isn't. The right-hander threw seven shutout innings, and the Nationals beat the Atlanta Braves 4-0 to sweep a day-night doubleheader Tuesday, ensuring the Braves leave Washington without the NL East title.