Mark DeRosa led off the Chicago sixth and fouled the third pitch back toward the on-deck circle, where Cintron was standing. The ball struck him on the right side of his face, below his cheekbone, and he fell to the ground. Cubs athletic trainer Mark O'Neal came out to treat Cintron, who was able to walk off the field.
"It was scary," Cubs manager Lou Piniella said. "He got lucky that it wasn't under the cheek bone under the eye."
Cintron was being treated for swelling, and his status was day-to-day.
Meanwhile, infielder Ronny Cedeno was not available Friday because of a tight hamstring.
Carrie Muskat is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.