Freeman flied out to left field in the first and then grounded out into a shift in the third, appearing to show some discomfort on a swing during his second at-bat. Chris Johnson took Freeman's place at first base during the top of the fifth, with the Giants leading, 6-0.
"I didn't even see him come off," Gonzalez said. "For him to come off the field like that, something was bothering him. He came up right to the trainers in here and [head athletic trainer] Jeff [Porter] came up and tapped me on the shoulder and said, 'Hey, Freeman just went down with an oblique.'
"So we'll see what tomorrow brings us."
The Braves announced Freeman's status as day to day. He recently came off the disabled list after spraining his right wrist, but has hit under .200 in the 10 games that he's been back.
Carlos Collazo is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.