WASHINGTON -- Giants manager Bruce Bochy held Aaron Rowand out of Saturday's lineup after the outfielder left Friday's game with a tight right quadriceps.

Rowand said he's available for pinch-hitting duty against the Nationals and hopes to be back in the lineup for Sunday's game.

"[Bochy's] just taking precaution," Rowand said. "It's tender, and he doesn't want to take a chance. We're just going to give it a day to calm down."

Bochy agreed that he wasn't taking any chances this early in the season. Fred Lewis moved over to center field for this game.

"I feel we should give him another day," Bochy said. "He came out, and he jogged and felt better, but it's not worth the risk right now."

Rowand dealt with a similar injury in Spring Training, one that sidelined him for a few days. He said, after Friday's game, that this was the same type of problem.

He felt problems with the quadriceps after making a long run to catch a fly ball in deep center field, a play that ended the Washington half of the sixth inning. Rowand immediately told Bochy, who pulled him.

"I'll be available to pinch-hit and stuff today," Rowand said. "If it was do or die right now, and I had to play, I could play tonight. It's just a matter of going out, and you end up having it grab on you again halfway through the game and then have to come out of the game."

The loss of Rowand is a tough one for the San Francisco offense as he's been hot all season. He's now hitting .328 with eight homers and 36 RBIs and has been one of the Giants' most consistent hitters.

Rowand is sixth in the National League in hitting and is among the leaders in a number of offensive categories. He's first in the NL in road average (.404) and average against left-handed pitching (.456).

He also is first on the Giants in hits (67), homers (eight), on-base percentage (.396) and slugging percentage (.525).