Monroe had not practiced in the past three weeks since hurting his shoulder against the Rams in Week 11. NFL Media Insider Ian Rapoport reported this week that the shoulder hadn't progressed since the injury, which pointed to Saturday's roster move.
Monroe has struggled to stay on the field since the Ravens gave him a five-year, $37.5 million deal before the 2014 season. He has missed 12 of a possible 30 games since signing the contract. Monroe will be 29 by the start of next season. The Ravens could be tempted to explore other options in free agency or the draft.