WASHINGTON -- The Elias Sports Bureau confirmed Sunday that Giants catcher Buster Posey's recent 10-game hot streak set a record for National League rookies.

Posey went 4-for-5 Saturday with three RBIs in a 10-5 victory over Washington. That means he's banged out 19 hits -- with six homers -- and knocked in 13 runs during the last 10 games entering Sunday. Elias said that no other National League rookie has ever had that many hits, homers and RBIs during a 10-game stretch.

It's happened a bunch of times in the American League, but Posey now has set the standard for NL rookies. He was batting .351 with seven homers and 23 RBIs since his May 29 callup.

Posey walked in his first at-bat in Sunday's game.

"I try not to have too many expectations, whether it's for a year, or for a week or for a day and just try to go out and play as hard as I can and let the results take care of themselves," Posey said.

San Francisco manager Bruce Bochy has been impressed with Posey at the plate.

Bochy also showed some real faith in Posey during Saturday's game, starting two baserunners three straight times while the catcher had two strikes on him -- and Posey eventually got a single to right that gave San Francisco the lead for good.

"He's got great discipline at the plate," Bochy said. "It's nice to have a hitter like that [where] you're confident he's going to put the ball in play."

Torres still limited by tight groin

WASHINGTON -- Outfielder Andres Torres was again out of the starting lineup due to tightness in his left groin, but he was available to pinch-hit and should be ready to return after the All-Star break.

Torres hurt the groin in the first inning of Friday's loss to the Nationals and came out after the fourth. He didn't play Saturday, although Bochy said the injury wasn't as bad as originally feared.

Before batting practice Sunday, Torres said the groin had improved.

"Today it's better, maybe [I could] pinch-hit today," Torres said. "It wasn't as bad as we thought. It's something mild."

Sanchez struggles on no-no anniversary

WASHINGTON -- Jonathan Sanchez threw a no-hitter July 10, 2009, but he didn't find the same success in 2010, lasting just 3 2/3 innings in Saturday's start.

Sanchez said he knew it was one year to the day of his no-hitter against the Padres last year, but he couldn't get all his mechanics right. He gave up five runs on five hits despite striking out six.

"I was just having trouble with getting my release point, finding my fastball," Sanchez said.

The best part of his night came when he got a two-run single to center off Washington starter Craig Stammen in the second inning. That gave San Francisco a brief 3-2 lead before the Nationals quickly struck back.