PHILADELPHIA -- Ian Desmond's 11th-inning grand slam lifted the Washington Nationals to a 6-2 victory over the Philadelphia Phillies on Wednesday night, as the Nats averted a three-game sweep.
Desmond's homer, his 10th of the year, came on a 2-2 pitch from Phillies reliever Michael Stutes (2-1), and helped Washington end a three-game losing streak, as well as Philadelphia's six-game home winning streak.
Drew Storen (2-1) pitched a scoreless inning in relief to earn the victory.
The Nationals had forged a 2-2 tie in the ninth on an RBI single by ex-Phillie Jayson Werth. It came off Philadelphia closer Jonathan Papelbon, who blew his second save in three nights.
With one out in the 11th Ryan Zimmerman doubled. Stutes intentionally walked Adam LaRoche and also walked Werth, loading the bases.
The dramatic finish followed a pitchers' duel between the two starters, Philadelphia's Kyle Kendrick and Washington's Gio Gonzalez.
Kendrick allowed two hits and one run over 7 2/3 innings, while Gonzalez surrendered hits to the first two batters he faced -- the second a two-run homer by Michael Young -- and did not allow another hit in seven innings of work.
Young's homer was his third of the season and raised his career RBI total to 1,001. He became the 19th active player to drive in more than 1,000, and the 242nd in major-league history to reach that milestone since RBI became an official statistic in 1920.
Gonzalez logged a season-high 11 strikeouts -- three each of Ryan Howard and Domonic Brown -- while walking two.
Kendrick, who retired 16 straight hitters in one stretch, allowed only a leadoff single to LaRoche in the second and an RBI single to Werth in the seventh. The only other baserunner permitted by Kendrick was Zimmerman, who drew a one-out walk in the seventh.
Kendrick struck out six and generated 13 groundball outs, but with a 2-1 lead gave way to Antonio Bastardo, who recorded the last out of the eighth.
Papelbon allowed an infield single to Denard Span to start the ninth, and two outs later walked LaRoche. Werth grounded his single through the left side of the infield to bring Span home.
Young homered on a 2-2 pitch from Gonzalez in the first. It came after Ben Revere led off the inning with a single, extending his hitting streak to 10 games.
NOTES: Phillies 2B Chase Utley, out since May 20 with a strained oblique, began a rehab assignment at Double-A Reading on Wednesday. Manager Charlie Manuel said that if all goes well, Utley will be activated Friday or Saturday, during the Phillies' series against the Mets. ... The Nationals wrapped up a nine-game road trip. They begin an eight-game homestand Thursday with the first of four games against Colorado.