Tanner Roark #57 of the Washington Nationals pitches in the sixth inning (Mitchell Layton/Getty Images)

Tanner Roark pitched seven sharp innings and made a rare contribution with his bat to help the surging Washington Nationals beat the Philadelphia Phillies 8-0 Saturday.

Stephen Drew and Anthony Rendon had two RBIs apiece for the first-place Nationals, who have won nine of 12 to move a season-high 14 games over .500 (38-24).

Roark (5-4) gave up six hits, struck out seven and walked one. Coming off the shortest start in his four-year career — a three-inning clunker in Cincinnati — the right-hander found his groove against the skidding Phillies.

In three starts against Philadelphia this season, Roark is 2-0 with an 0.86 ERA.

Sign up for the NJ1015.com Newsletter

Get the best of NJ1015.com delivered to your inbox every day.

(Copyright 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed)