AT&T PARK — Brandon Crawford drove in four runs and Jarrett Parker homered to lead Jeff Samardzija and the streaking San Francisco Giants past the San Diego Padres 8-2 on Tuesday night.

Buster Posey and Denard Span each knocked in a run for the Giants, who have won four straight and 12 of 13.

John Jay homered for the Padres, who lost their third in a row and fell to 0-8 against the Giants this season. Hector Sanchez also drove in a run.

Samardzija has won three consecutive decisions and six of seven after giving up a run and six hits over 6 2/3 innings. He struck out seven and walked three.

Andrew Cashner came off the disabled list and gave the Padres a six-inning start. He allowed three runs and four hits, walked four and struck out one.

Pitching with a 3-1 lead, Samardzija got the first two outs of the seventh and then gave up a hit to Alexei Ramirez and walked pinch-hitter Christian Bethancourt. Josh Osich came on and mishandled Jay’s grounder to load the bases before getting Alexi Amarista to ground out.

Joe Panik drew a walk to open the sixth and was sacrificed to second. Posey, a .400 hitter against Cashner, delivered a sharp liner into left field for a double that snapped a 1-all tie. Posey later scored on Crawford’s single.Crawford’s bases-loaded triple and Parker’s two-run homer in the eighth against Keith Hessler broke it open. Brandon CrawfordBruce Bochyjarrett parkerJeff SamardzijaJoe PanikMLBSan Diego PadresSan Francisco Giants