With the transition tag, the Bears have the right to match any contract offer that Fuller receives from another NFL team, though they would not receive any compensation if they opted not to match the offer. Fuller can sign with another team through July 23.
Fuller, who was due to become an unrestricted free agent, had a resurgent 2017 season after missing the entire 2016 campaign following knee surgery. He started all 16 games, recording 68 tackles, two interceptions and a career-high 22 pass breakups.
