"The muscle just tightened down there," Anderson said.
Anderson, 37, struck out in his first at-bat and played one inning in left field but did not join his teammates on defense for the bottom of the second. Rookie Reid Gorecki, who recorded his first big league hit in Wednesday's game, replaced Anderson in left.
The Braves originally diagnosed his injury as a lower back strain. But Anderson later clarified that most of the discomfort was in his hip -- an issue for him once before during his career with the Angels.
"He says he's going to be OK," Braves manager Bobby Cox said. "Hopefully, he's fine."
Anderson is batting .284 with 11 home runs in 99 games this season.
Anthony DiComo is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.