Byrd fouled a ball that hit the ground and bounced up and hit him in the face, resulting in bruising and cuts. He had an X-ray that did not reveal any structural damage.
"We want to be careful," Cubs interim manager Mike Quade said Saturday. "He's a tough guy and he'll let us know when he thinks he's better.
"I'm sure he's sore. It was cut. My sense is he'll be fine. He's day-to-day."
Byrd did not grant interviews Saturday.