Hairston is expected to return to the field by midweek.
"I never got hit in the head before, but I want to get back
there as soon as possible -- really kind of get back on the horse,
so to speak," Hairston said.
Hairston stayed down for a couple of minutes after getting hit in the helmet in the bottom of the first inning Sunday, but walked off the field. He was taken to a hospital for a precautionary CT scan.
"He looks pretty good," manager Dusty Baker said. "He said he doesn't feel anything, but we still have to kind of be cautious today and tomorrow. ... He might be ready on Wednesday."