Ian Desmond had a career-high five RBIs and Stephen Strasburg won his third straight decision for the Washington Nationals in their 9-2 victory over the Giants on Monday night.
Denard Span added a triple and two doubles to help the Nationals win for the eighth time in 10 games. Desmond had three hits and Jayson Werth drove in two runs.
San Francisco had its five-game winning streak snapped.
Strasburg (6-4) allowed four hits over six innings and retired his final 10 hitters. He struck out seven and did not walk a batter, improving to 3-0 against the Giants with 29 strikeouts in 25 innings.
Nationals starters have struck out 52 and walked one in their last seven games.
Ryan Vogelsong (4-3) retired 10 of 11 batters during one stretch and pitched into the seventh. But he gave up six runs and nine hits, ending his three-game winning streak.
Desmond, who owns a .373 career batting average against the Giants, also has an impressive .434 mark (23 for 53) with 51 RBIs with the bases loaded.
His two-run single with the sacks full in the third gave Washington a 4-1 lead. Desmond tripled home a run in the second and added a two-run double in the seventh.
Werth drove in the Nationals' first run in the first inning and added an RBI single in the seventh. He also scored on an error.
The Giants scored their first run in the second. Tyler Colvin doubled with one out and came home on Brandon Crawford's single. Joaquin Arias added an RBI single in the eighth.
Strasburg struck out the first batter he faced in four of his six innings. He also ended three innings with a strikeout.
NOTES: Nationals INF Anthony Rendon (sore right hand) was out of the starting lineup for a third straight game. He's expected to start Tuesday. ... Giants OF Angel Pagan was out of the lineup with a bruised right shin. ... Giants RHP Santiago Casilla is expected to start a rehab assignment at Class-A San Jose on Wednesday or Thursday. ... RHP Doug Fister (4-1, 3.19 ERA) pitches Tuesday for the Nationals. He's walked two batters in 36 2-3 innings this year. LHP Madison Bumgarner (8-3, 2.86) starts for the Giants. He's on a six-game winning streak.