The Nationals clinched their second NL East crown in three years, beating the slumping Braves 3-0 as Tanner Roark combined with two relievers on a five-hitter, while Ian Desmond broke a scoreless tie in the sixth inning with a two-run homer. Atlanta lost for the 11th time in 14 games, further damaging its hopes of making a third straight playoff appearance, this time as a wild card. The Braves dropped to 75-76 with their fifth straight loss, the first time they have been under .500 since losing on opening day. The Braves fell 5 1/2 games behind Pittsburgh for the second NL wild card with 11 games left in the regular season. Roark (14-10) pitched around four leadoff singles by Atlanta, which never got a runner past second base. The Braves right-hander made his 350th career start. Nationals LF Bryce Harper was back in the lineup after leaving Monday's game in the third inning when he felt light-headed. Braves: C Evan Gattis missed his eighth straight game since coming down with strep throat.