PHILADELPHIA -- With the Phillies' World Series aspirations on the line, manager Charlie Manuel made a significant change to his lineup Saturday for Game 6 of the National League Championship Series against the Giants.

Jimmy Rollins is leading off.

Shane Victorino is hitting sixth.

It is the first time Manuel has used this lineup this season:

1. Rollins, shortstop
2. Placido Polanco, third base
3. Chase Utley, second base
4. Ryan Howard, first base
5. Jayson Werth, right field
6. Victorino, center field
7. Raul Ibanez, left field
8. Carlos Ruiz, catcher
9. Roy Oswalt, pitcher

"He's got more legs underneath him," Manuel said of Rollins. "His foundation at the plate has been better. The other day when he showed me he could run [Thursday in Game 5] ... I've always looked at him as our leadoff hitter, and he is the guy.

"It's not that Victorino can't do it. Victorino also has some success in the postseason hitting down in the order, in the sixth- and seventh-hole."

Rollins has hit .263 (5-for-19) with one double, four RBIs and two stolen bases in the series. Victorino has hit .150 (3-for-20) with one double, two RBIs and one stolen base.

"I felt like that's the best way for us to go," Manuel said. "I feel like that's our best lineup. I've always felt that way since the start of the season."

Halladay has 'mild to moderate' groin strain

PHILADELPHIA -- Roy Halladay told Phillies manager Charlie Manuel on Saturday he is OK.

Halladay pulled his right groin Thursday in Game 5 of the National League Championship Series against the Giants at AT&T Park. A MRI exam on Friday in Philadelphia showed Halladay has a "mild to moderate" strain.

"He said he's ready to go," Manuel said when asked if Halladay could pitch in relief this weekend at Citizens Bank Park. "He said anytime I need him, he's ready to go. That's what he told me. But I'll go back and check with our medical staff, too. But Roy's going to be fine. I feel good about him."

But Phillies general manager Ruben Amaro Jr. said a short time later Halladay probably will not pitch in relief this weekend.

"I doubt it, but I don't know," Amaro said.

Would Manuel risk pitching Halladay with an injured groin anyway knowing they would need him in the World Series, if they get that far?

"I can pretty much answer [that] I'm not going to use him tonight," Manuel said. "We'll see tomorrow. If we get to tomorrow, we'll see. We're going to get to tomorrow. I don't want to say if we get there, because we are going to get there."

Utley dealing with inconsistent swing

PHILADELPHIA -- Chase Utley has such a short and compact swing, it is a mild surprise every time he slumps.

But his current slump comes at a most inopportune time.

He is hitting .158 (3-for-19) with three walks, two strikeouts, three stolen bases and four runs scored in the National League Championship Series against the Giants. He is hitting just .182 with one home run and four RBIs in his last nine postseason games, dating to Game 6 of the 2009 World Series.

"It's consistency in his swing right now," Phillies manager Charlie Manuel said Saturday before Game 6. "He hasn't found his real good timing and his rhythm and balance. He's what I call a 'technique hitter.' He doesn't feel like he's right. And it kind of looks that way. But he might find it tonight. I'm pulling for him to find it tonight, OK?"