SCOTTSDALE, Ariz. -- The Giants reassigned center fielder Gary Brown to Minor League camp, intent on getting more activity for one of their top prospects.

Brown, San Francisco's No. 1 selection in the 2010 First-Year Player Draft, had played 28 innings in center this spring, behind projected Opening Day starter Angel Pagan (41) and non-roster sensation Gregor Blanco (38). Brown hit .182 (2-for-11) in seven Cactus League games.

Brown, 23, likely will begin the season at Double-A Richmond after hitting .336 last year at high-Class A San Jose.

Posey slated for defensive respite

MESA, Ariz. -- Buster Posey caught five innings in the Giants' 3-2 exhibition victory Friday over the Chicago Cubs. Next up: a three-day break from catching.

Posey will accumulate at-bats Saturday by serving as a designated hitter in a Minor League exhibition game. Manager Bruce Bochy said that Posey won't play in Sunday's exhibition against San Diego, which is followed by a team-wide scheduled off-day Monday.

Posey said that he might catch six innings, which would be a personal high for this Cactus League season, in Tuesday's game against Arizona.

Against the Cubs, Posey went 1-for-2 with a walk. His second-inning single off Matt Garza, like the home run he struck Wednesday for his first Cactus League hit this year, was stroked to the right side. It was a low line drive that second baseman Adrian Cardenas couldn't handle.

Asked about the hit, Posey said, "Any time you can get deep in the count and get the barrel on a tough pitch, you're happy with that at-bat."

Worth noting

• Freddy Sanchez's Cactus League debut at second base will wait until next week, at the earliest. On Friday, manager Bruce Bochy posted the lineups for Saturday's split-squad games, which had Sanchez playing against Oakland and making his fifth spring appearance as a designated hitter. Before playing Sanchez on defense, Bochy wants to watch him take infield practice at least one more time and test his injured right shoulder by throwing without hesitation.

• Right-hander Sergio Romo is temporarily unavailable to pitch due to discomfort in his elbow, the San Francisco Chronicle reported. Romo has experienced occasional elbow problems in recent springs.

• Left-hander Eric Surkamp recorded his best outing of the spring, allowing one run and four hits in four innings during Friday's 3-2 victory over the Chicago Cubs at Mesa, Ariz.

"I was just trying to stay fluid and keep my arm moving with the lower body," said Surkamp, who has a chance to make the season-opening rotation as the No. 5 starter if Ryan Vogelsong begins the season on the disabled list. "No matter where I end up, I just want to get my starts in every fifth day, whether it's in [Triple-A] Fresno or San Francisco," Surkamp said.

• Emmanuel Burriss has made seven appearances at second base, three each at shortstop and third base and two in left field.

• Though first-base prospect Angel Villalona is still wrestling with visa problems, the Giants optioned him to their high Class A San Jose roster.

This was to be Villalona's first Major League Spring Training, but he was never able to leave his native Dominican Republic because of visa complications.