San Diego, CA (Sports Network) - Chase Headley went 3-for-3 and smacked one of three San Diego home runs that propelled the Padres to a 6-4 win over the slumping San Francisco Giants and a three-game sweep of their NL West rival.
Alexi Amarista and Nick Hundley each added two-run shots while collecting two hits apiece, with Amarista scoring three times, to help San Diego to its season-high fourth straight victory and first sweep of the defending World Series champions since May 11-13, 2010 in San Francisco.
Jason Marquis (2-2) aided the Padres' cause by holding the Giants to two runs and six hits hits over 6 2/3 innings, while Huston Street tossed a scoreless ninth to pick up his fifth save of the season.
Buster Posey had a two-run homer for San Francisco and Pablo Sandoval finished 4-for-5 with an RBI single in the loss, the fifth in a row for the Giants.
Ryan Vogelsong (1-2) served up all three San Diego homers and allowed six runs -- five earned -- over a shaky five innings of work.