Ian Desmond finished 4-for-4, and his eighth- inning infield single was responsible for the deciding run as Washington clipped Colorado, 5-4, in the rubber match of a three-game series at Coors Field.
Ryan Zimmerman added a two-run homer and drove in three for the Nationals, who have won four of five overall and continue their nine-game road trip in Cleveland on Friday.
Craig Stammen (4-2) allowed one hit in two scoreless relief innings, and Rafael Soriano managed to pick up his 17th save despite allowing a run in the ninth.
Tyler Colvin, Wilin Rosario and Todd Helton drove in a run each for the Rockies, who have dropped two in a row and three of five.
Matt Belisle (4-3) was charged with two runs on three hits in the deciding frame.
Roger Bernadina's pinch-hit double with one out in the eighth turned into the lead run when Zimmerman followed by bouncing a two-bagger off the right-field wall. He moved up on Jayson Werth's grounder, then Adam LaRoche walked and Desmond's infield hit to short made it 5-3. A wild pitch and walk then loaded the bases, but Suzuki grounded out to keep it a two-run margin.
Nolan Arenado singled with one gone in the Rockies' last turn at the plate, then went to second on defensive indifference and scored when pinch-hitter Helton laced a two-out single to center. Disaster was averted when Jonathan Herrera popped out to end the game.
Dexter Fowler began the home first with a double and scored on a one-out single by pinch-hitter Colvin.
Washington came back with two in the third as Nationals starter Ross Detwiler led off with a base hit and came in on Zimmerman's two-out, two-run homer.
Colorado moved back on top in the fourth. Troy Tulowitzki singled and came around on a Michael Cuddyer double compounded by a Werth error that left the former Twin at third. Rosario's grounder to short then plated Cuddyer for a 3-2 game.
The Nats tied the game in the seventh thanks to two miscues from reliever Wilton Lopez. Desmond led off with a hit, stole second when Suzuki fanned, then moved to third and scored on consecutive balks by the Rockies reliever.