Wrigley Field had a highly publicized structural problem in 2004 when three separate incidents of falling pieces of concrete were reported, including one chunk reportedly as large as a small brick. No injuries were reported, but after the second incident in July, city officials called for a “100 percent hands-on inspection” of the upper deck and mezzanine levels. The Cubs eventually ordered protective netting installed under the upper deck as a precautionary measure, and have had no similar incidents since.