The Giants entered Wednesday's series finale against the Pirates on a four-game losing streak, but they did receive good news prior to first pitch.
Jake Peavy threw 40 pitches in a bullpen session and will make another rehab start for Triple-A Sacramento on Saturday.
"He's feeling a lot better with that lower back, and that's good news for us," Bruce Bochy told reporters. "So it looks like he can resume his rehab and hopefully he can stay away from any more setbacks and get him ready here.
"It's gonna take a few starts for him because he did have a little setback here, but the good news is he thinks he's gotten over the hump where it was bothering him there.