The team placed Miller on the injured reserve list.
NFL Media Insider Ian Rapoport reported Friday that the tight end suffered a Lisfranc injury -- torn ligaments. He will undergo another test to see if there is further damage.
Miller has an extensive injury history, which caused him to miss all of the previous two seasons. The 29-year-old played just four games in 2011.
The Bears would like to keep him in Chicago, per Rapoport, but he'll miss his third straight season.