SAN DIEGO -- Giants left fielder Barry Bonds could be sidelined for up to a week with his sprained right big toe, manager Bruce Bochy said Sunday, revising an original estimate.

After Bonds hurt himself while pursuing Adrian Gonzalez's long drive in Saturday night's second inning, Bochy said that Bonds might be shelved for two or three days. But Bochy reported that the swelling around Bonds' toe increased "quite a bit" overnight, requiring a more prolonged rest.

"It could be five to seven days for Barry," Bochy said. "We'll see how he comes around the next couple of days. He jammed it pretty good."

Bonds, 43, landed awkwardly after leaping at the wall for Gonzalez's hit, which resulted in a triple. Television replays indicated that a fan with a fielder's glove might have deflected the ball away from Bonds or knocked it out of his glove. Giants right-hander Matt Cain said that Bonds told him he had the ball in his grasp but had it jarred from him.

Bonds, baseball's all-time home run leader with 762, is batting .279 with a team-high 28 home runs. His contract expires after this season, leaving his playing status for 2008 uncertain. That has lent an added sense of finality to the remainder of the schedule, which includes a seven-game homestand for the Giants at AT&T Park and a season-ending three-game series at Dodger Stadium, always a big stage for the ballclub and Bonds.

But Bochy said that he wanted Bonds on the field to do more than just receive a proper send-off.

"We need his bat," Bochy said. "We have a power shortage and it's great to have him in the lineup."

Bonds ranks fifth on the Giants with 125 games played, five fewer than last year. He has missed as many as two games in a row only once this season, Aug. 19-20 at Florida.

"At his age, to play as much as he has and to be as healthy as he's been, I do feel fortunate," Bochy said. "It's pretty amazing how well he has felt all year."

Epic confrontation: Although he ultimately struck out swinging, Nate Schierholtz derived some pride from his eighth-inning at-bat Saturday against San Diego reliever Heath Bell. The standoff lasted 15 pitches, including 10 consecutive foul balls -- nine with the count 3-2.

Some impatient fans even started booing as the confrontation lengthened.

"I look back on it and it was a good at-bat. ... I was locked in," Schierholtz said. "I couldn't put the ball in play, but I battled and battled. A lot of times, things will work out and you'll find a hole after fouling off so many pitches, but he made a good pitch and got me out."

It was such a good pitch that Schierholtz wasn't sure what it was: "It was either a curve or a slider; I think it was more of a slider."

Schierholtz saw a mixture of fastballs and sliders while fouling off pitch after pitch from Bell, who has emerged as one of the National League's top setup relievers.

"I was looking for fastballs, but I had the slider in the back of my mind," Schierholtz said.

Bell's concern grew along with his pitch count.

"At that time, I was [thinking], 'Geez, pop it up, ground out or swing and miss,'" he said. "I tried to come with things different. I tried to move my glove, I tried rotating my glove in my hand, so he'd think I was throwing a curve. Sometimes I took looks at the guy on second, even though I knew he wasn't going to take third. I went in, out, up and down."

Short hops: Left-hander Jack Taschner, inactive since Sept. 3 with a strained shoulder, was available to pitch Sunday. ... Right-hander Randy Messenger's ineffectiveness Saturday, when he allowed a single, two doubles and a home run to the four batters he faced, was understandable, since he hadn't pitched since Aug. 14. "He looked a little rusty. He just wasn't locating well," Bochy said. ... With 102 stolen bases, which ranked fourth in the NL entering Sunday, the Giants have topped 100 thefts for the first time since they had 109 in 1999.

Coming up: The Giants begin a three-game series at division-leading Arizona on Monday. First pitch is scheduled for 6:40 p.m. PT. Kevin Correia will confront Diamondbacks ace Brandon Webb.