SCOTTSDALE, Ariz. -- Marcus Semien maintained his torrid production, driving in three runs Wednesday to help pace the A's to a 9-2 victory over the Giants in a Cactus League exhibition.
Semien, who drove in four runs against San Francisco on Tuesday, contributed a two-run, first-inning single and an RBI single in Oakland's four-run fourth inning. The A's scored in each of the first five innings as they hiked their two-day scoring edge against their cross-bay rivals to 18-6.
"I'm just trying to get good pitches to hit, especially with runners in scoring position, and take advantage of pitches in the zone," Semien said. "Hitting's been contagious so far. We're feeding off each other."
The A's treated a Giants starter rudely for the second day in a row. This time the victim was Jake Peavy, who allowed a pair of first-inning runs before being excused for the rest of the afternoon. Tuesday, Madison Bumgarner yielded four runs and five hits in 1 2/3 innings.
Said Peavy, who surrendered four hits to the first five A's batters, "It's a typical first outing, really. I'll try to build off of this."
The Giants briefly halved the lead on Buster Posey's two-run double in the third inning off Jesse Hahn. After sitting out Tuesday's exhibition opener, Posey, who led San Francisco with 89 RBIs last year, started behind the plate and briefly lifted the hopes of Giants partisans in the Scottsdale Stadium crowd.
But overall, it was an A's afternoon. Josh Reddick went 3-for-3 and drove in two runs to support rotation candidate Jesse Chavez, who started and blanked San Francisco for two innings. Mark Canha concluded Oakland's scoring in the fifth with a two-out homer off Giants closer Santiago Casilla.
Giants up next: San Francisco will receive its first look Thursday at the rejuvenated and revamped Chicago Cubs, who are expected to share contender's status with the Giants. Ryan Vogelsong, a leading candidate to rejoin the rotation if reinforcements are needed, will start for the Giants at 12:05 p.m. PT against fellow right-hander Jacob Turner.
Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.