WASHINGTON (AP) - Bryce Harper and Adam LaRoche each drove in two runs, leading the Washington Nationals over the Pittsburgh Pirates 5-4 Friday night for their fourth straight win.
Denard Span added three hits as the NL-East leading Nationals opened a 10-game homestand.
Tanner Roark (12-7) gave up three runs on five hits over 5 2-3 innings. He struck out four and walked two.
Rafael Soriano allowed three hits in the ninth, including Pedro Alvarez's RBI single, but held on for his 29th save.
Starling Marte hit a two-run homer and singled for the Pirates, who have lost three straight.
Charlie Morton (5-12) lasted just three innings in his shortest start of the season, allowing five runs on seven hits and three walks.