PHILADELPHIA -- Chipper Jones is confident that he'll be back in the lineup when the Braves stage their home opener against the Phillies on Friday night. But Garret Anderson might find himself out of the lineup for a longer period.

Jones and Anderson were both scratched from the lineup before the start of Wednesday afternoon's series finale against the Phillies at Citizens Bank Park.

While Jones' bruised left thumb doesn't seemingly provide reason for concern, the Braves certainly have reason to be concerned about the fact that Anderson aggravated his right calf muscle while running in the outfield before Wednesday's game.

This is the same calf that Anderson strained on March 6, when he was preparing to play in just his second exhibition game of the year. That ailment sidelined him until March 29, when he returned in time to participate in the final week of the exhibition season.

Anderson wasn't willing to provide a timetable for his return. But it seems like he could certainly be out of the lineup during this weekend's series against the Nationals. The 36-year-old outfielder was healthy enough to pinch-hit with two outs in the ninth inning of Wednesday's 12-11 loss. But he didn't look good while recording a game-ending strikeout against Brad Lidge.

"I think as time goes on, I'll probably get a better feel for where it's at," Anderson said. "I can't make that kind of analysis now. It's just something that I don't want to go down the same avenue that I was on in March, when I was out for a month doing nothing. I just want to stay on it so that I can make sure it doesn't get worse."

Anderson played left field during the entirety of the first two games of this season against the Phillies. While he didn't get much action during Derek Lowe's masterpiece on Sunday night, he was forced to do some running during Tuesday night's game, which was played amid temperatures that rested in the upper 30s.

Anderson said he believed that cold weather may have led to him aggravating the calf muscle. At the same time, he said that the discomfort isn't nearly as bad as it was when he initially suffered the injury.