Burns, 25, originally joined the Bears last March after spending his first four NFL seasons with the Steelers. But he tore his ACL during a training camp practice in August and spent the entire season on injured reserve.
Burns was selected by the Steelers with the 25th pick in the first round of the 2016 draft out of Miami, where he teamed with Bears safety Deon Bush. The 6-foot, 197-pounder appeared in 58 games with 32 starts for Pittsburgh, recording 149 tackles, four interceptions and 27 pass breakups.
Burns was anointed Pittsburgh's primary nickel back seven weeks into his rookie season in 2016 and then started the final seven games at cornerback. Appearing in all 16 contests with nine starts, he registered 65 tackles, three interceptions and 13 pass breakups.
Burns started all 16 games in 2017 for the only time in his career and compiled 54 tackles, one interception and 13 pass breakups. Over the next two seasons, he appeared in 26 games with seven starts.