The incident happened just before the start of the eighth inning.
The man fell from a dining area about 15 feet above the bullpen. The area is lined with a metal railing that is about four feet high.
Medical personnel put the man on a stretcher and brought him through the bullpen door. He was taken to Froedtert Hospital in Wauwatosa.
The Brewers say he was conscious and alert when he left Miller Park. His injuries are believed to be non-life threatening.