Brown (concussion) was waived from injured reserve Tuesday.
Brown was placed on injured reserve prior to Week 1. The 27-year-old receiver last played in a regular season game for the Ravens in 2015.
Brown was evaluated for a concussion during Saturday's preseason game against the Chiefs, Brad Biggs of the Chicago Tribune reports.
With approximately a week remaining before roster cuts, a confirmed concussion could play a factor in the team's decision on his roster spot. More information regarding his status moving forward should surface following tests.
Brown didn't play in 2017 after being waived by Denver before the start of the regular season. He last saw regular season action while with the Ravens in 2015, recording 112 yards on 14 catches in 10 games. He'll be looking to get a spot near the bottom of the Bears' receiver depth chart in 2018.