Rutledge doubled with two-out in the seventh, but Zimmerman recorded the final out with a running, over the shoulder catch of pinch-hitter Tyler Colvin's pop-up in foul territory along the left field line. After Dexter Fowler reached second base with one out in the eighth following a walk and Storen's throwing error, Carlos Gonzalez and Michael Cuddyer struck out.
"There's no secret formula," Rockies manager Walt Weiss said. "You go up there, take good at bats, take some timely hits. That's all you can do."
In two starts since returning from the disabled list on June 16 following a lower lat strain, Strasburg has surrendered one earned run and seven hits over 12 innings.
Corpas pitched 1 2-3 innings, allowing only Desmond's homer.
Chatwood entered the game having allowed one earned run in three road starts. The Nationals failed to put a runner into scoring position through five innings. He gave up one run and four hits over six innings with four strikeouts and two walks.
Cuddyer's opposite field single in the first inning extended the longest active hitting streak in the majors. Cuddyer promptly stole second base and moved to third with one out, but Strasburg neatly ended the threat with a strikeout and grounder.
NOTES: Cuddyer has reached base safely in 38 straight games, tying the Rockies record set by Matt Holliday in 2007. ...Fowler (right ring finger) returned to the Rockies' lineup in the leadoff spot after missing the previous three games. ... The Rockies called up OF Corey Dickerson from Triple-A Colorado Springs and designated RHP Logan Kensing for assignment. ...Colorado RHP Jhoulys Chacin (5-3, 4.26) opposes Dan Haren (4-8, 5.72) for Saturday's 12:05 p.m. matchup