Jonathan Sanchez not improving

SAN FRANCISCO -- Giants left-hander Jonathan Sanchez might be done for the season with a left ankle sprain that isn't improving.

Manager Bruce Bochy said Sunday that Sanchez hasn't made progress, more disturbing injury news for the reigning World Series champions. Sanchez was the team's most reliable starter down the stretch in 2010, and the winning pitcher on the season's final day when the club clinched its first playoff berth since 2003.

"He's still not making the progress we'd hoped. He hasn't thrown at all. He's a ways away," Bochy said. "The way it's going, it could be a close call between he and Buster (Posey)."

And 2010 NL Rookie of the Year catcher Posey is out for the year. He sustained a season-ending broken leg in a May 25 home-plate collision with Florida's Scott Cousins. The Giants also are without second baseman Freddy Sanchez, who is sidelined for the rest of the year after labrum surgery on his right shoulder.

Jonathan Sanchez last threw Aug. 19 at Houston to see if he could start two days later, but he didn't respond.

San Francisco did get some reinforcements Sunday.

Andres Torres came off the disabled list to start in center field and bat leadoff for the series finale against Houston. Reliever Sergio Romo also returned after missing time with elbow inflammation. Romo is 3-1 with a 1.47 ERA in 53 appearances.

"It's good news to have those two guys back," Bochy said.

Torres batted .275 with three home runs, two doubles and two triples with 10 RBIs in nine rehab games for Triple-A Fresno.

"He's been playing well," Bochy said. "Sometimes it can benefit the player going down to a less stressful environment and getting consistent at-bats. We're hoping he's going to come up and be the player we know he is."

The Giants optioned lefty Eric Surkamp to Class-A San Jose a day after he made his major league debut following a promotion from Double-A. He is set to pitch once for San Jose before returning to start for the Giants on Sept. 6 at San Diego. Reliever Dan Runzler is headed back to Fresno briefly, too.

Bochy said lefty Barry Zito is improving from a sprained right foot and ankle. He sprained the ankle while on a rehab assignment at Triple-A for the foot.

San Francisco chose not to transfer the struggling $126 million pitcher -- left off the postseason roster for all three rounds last fall -- to the 60-day disabled list Saturday when it needed room on the 40-man roster for Surkamp.

"He could be ready in a couple of weeks, which we may need as banged up as we've been getting," Bochy said.

Injured closer Brian Wilson, last season's majors saves leader who is nursing elbow inflammation, threw for about 10 minutes on flat ground. He is scheduled to be re-evaluated Tuesday.