Rookie Sean Marshall threw six-shutout innings Wednesday night as the Chicago Cubs beat Washington, 5-0.

Juan Pierre and Jacque Jones each had one run and two hits; Todd Walker had one hit and two RBI; while both Marshall and Ronny Cedeno had one run and one hit for the Cubs (17-22), who have back-to-back shutout wins over Washington.

Marshall, who retired the first 10 batters he faced, surrendered only one hit, walked four and struck out six.

Relievers Bobby Howry, Scott Williamson and Scott Eyre each hurled one inning.

Alfonso Soriano had the only hit for the Nationals, who have dropped six of their last seven games.

Losing pitcher Zack Day (2-4) gave up four runs and eight hits in four innings with three walks and one strikeout.