LOS ANGELES -- Giants second baseman Freddy Sanchez is continuing to recover from his injured left shoulder at extended spring training in Arizona and could begin an injury rehabilitation assignment in the Minor Leagues before the end of the month.

Sanchez has been taking batting practice off coaches and performing other baseball-related activities. Giants head athletic trainer Dave Groeschner said Saturday that Sanchez probably would need to maintain his current regimen for at least another full week before a rehab assignment would be considered.

"I think he's just trying to get in baseball shape," Groeschner said.

Sanchez, 32, could perform in extended spring training exhibitions without tapping his allotment of 20 injury-rehab games in the Minors.

DeRosa's hamstring strain not serious

LOS ANGELES -- Giants left fielder Mark DeRosa left Saturday's game against the Los Angeles Dodgers with a strained right hamstring, though the injury isn't considered serious.

Manager Bruce Bochy said that DeRosa conceivably could play in Sunday's series finale, though he'll be re-evaluated before the game.

DeRosa didn't rule out playing, though he said, "I'm not going to set myself back. If I can't go, I can't go. At the same time, I'm going to do everything I can to get on the field."

DeRosa hurt himself while hustling to second base during the Giants' four-run third inning, their biggest uprising in their 9-0 victory. With Aubrey Huff on first and nobody out, DeRosa hit a grounder that took a tricky hop and got past shortstop Jamey Carroll, who was charged with an error. Instead of halting at first base, DeRosa charged into second and didn't get up immediately after he slid, grabbing the back of his right leg.

DeRosa moved to third base as Bengie Molina was hit by a pitch and came home on Tim Lincecum's two-run single. Head athletic trainer Dave Groeschner attended to DeRosa after he returned to the dugout. DeRosa spent the bottom of the third inning in left field but was removed for pinch-hitter Andres Torres in the fourth.