By Jeremy Kahn

SAN FRANCISCO-In his first start as a member of the San Francisco Giants, Jake Peavy did not fare that bad.

Peavy went six innings, allowing four runs (three of them earned), two walks and five strikeouts; however it was a three-run Los Angeles Dodgers fifth inning that gave the sweep and a one and a half game lead with a 4-3 victory before 41,459, the 302nd consecutive sellout at AT&T Park.

This it is the first time that the Dodgers have swept the Giants since June 24-26, 2013, and the first time that the Dodgers have swept the Giants at AT&T Park since July 27-29, 2012.

Hanley Ramirez drove in what proved to be the game-winning run, as he singled off of Peavy to score Yasiel Puig, who walked following Dee Gordon, who reached first base after Peavy threw a wild pitch on a strikeout.

Gordon scored on a bizarre play that saw Adrian Gonzalez strike out, and as Gonzalez ran to first, Gordon came down the line to score the tying run.

Carl Crawford drove the Dodgers third and final run of the inning, as he tripled to score Ramirez and give the Dodgers a two-run lead.

Buster Posey got the Giants within one run, as he put a Hyun-Jin Ryu pitch into the left field seats on a 3-0 pitch.

That was the first 3-0 home run by Posey in his major league debut, according to David Feldman.

Posey is the first Giants batter to a 3-0 home run since Pedro Feliz since July 21, 2007, the longest drought by any team, this according to ESPN Stats and Info.

Ryu went six innings, allowing three runs on six hits, walking just one and striking out seven, as he improved his record to 12-5 on the season.

Hunter Pence gave the Giants a 1-0 lead in the bottom of the third inning, as he singled off of Ryu to score Dan Uggla, who was the first batter to reach base against Ryu, as he walked to lead off the bottom of the third.

It was a tough night got Uggla defensively, as he committed two fielding errors on the evening.