Washington, DC (Sports Network) - Buster Posey singled in the go-ahead run during a rally in the seventh inning and added a two-run homer in the ninth, as the Giants upended the Washington Nationals, 10-5, to win for the fifth time in six games.
Posey had four hits for the second time in four games. He has seven homers this season, including six during San Francisco's current 11-game road trip, which ends Sunday. Posey has been one of the hottest hitters in the last 10 days, batting .513 (19-for-37) with 13 RBI.
Aaron Rowand homered to tie the game to begin the four-run uprising in the seventh. Juan Uribe had three RBI and his two-run double capped the seventh- inning push for San Francisco, which bounced back from an 8-1 defeat on Friday.
Mike Morse homered for the Nationals, who also got two hits and an RBI from Ryan Zimmerman.
Jonathan Sanchez started for the Giants and gave up five hits and five runs over 3 2/3 innings. Santiago Casilla (2-2) recorded the last two outs in the sixth to get the win.
Uribe's sacrifice fly in the sixth scored Aubrey Huff to get the Giants within 5-4.
Ian Desmond was caught stealing third in the bottom of the frame, and the Giants pushed ahead in the seventh against Tyler Clippard (8-6). Rowand homered to left with one out. Clippard then walked Freddy Sanchez and Huff before Posey singled to right field. Doug Slaten entered from the bullpen, but Uribe doubled to right-center field for an 8-5 margin.
Huff singled to center leading off the ninth, and Posey followed by blasting a Miguel Batista offering barely over the wall in right field. A fan reached over the railing, just above the scoreboard, to make the catch. Umpires convened to watch a replay, but confirmed the home run call.
Zimmerman doubled in a run in the first inning, and Cristian Guzman scored on a Sanchez wild pitch in the same frame for a 2-0 advantage.
The Giants scored three times in the second thanks to an RBI double from Nate Schierholtz and a two-run single from Sanchez.
Morse's homer leading off the bottom of the second tied the game, and the Nats went ahead 5-3 in the fourth on RBI doubles from Ivan Rodriguez and starting pitcher Craig Stammen.
Stammen allowed six hits and four runs in 5 1/3 innings...The Nationals recalled Justin Maxwell from Triple-A Syracuse prior to the game. He started in center field, went 0-for-4 with a walk and scored once...The Giants are 14-4 against Washington since the start of the 2008 campaign.