LOS ANGELES — Ronnie Belliard hit a grand slam, Matt Kemp and James Loney added back-to-back drives off former teammate Brad Penny and the Los Angeles Dodgers routed the San Francisco Giants 12-1 today.

The Dodgers, who lost the series opener 8-4 Friday night, began the day with a five-game lead over Colorado in the NL West. The victory reduced their magic number to seven games for clinching a postseason berth for the third time in four years.

Loney went 3 for 4 and drove in two runs as the Dodgers improved to 10-7 against their rivals, with their largest margin of victory this season against them.

Jon Garland (11-11) gave up an unearned run and seven hits in eight innings, tying his longest outing of the season.