Hart is a former St. Thomas Aquinas High and Florida State University standout who has 66 games of NFL starting experience between the New York Giants and Cincinnati Bengals since 2015.
They also had third-year tackle Greg Little, whom Miami acquired in a preseason trade with the Carolina Panthers, miss Monday’s practice for undisclosed reasons. The Dolphins did get rookie lineman Liam Eichenberg back Monday after more than a week-long absence with a lower-body injury.
Hart spent training camp and the preseason with the Buffalo Bills, but he was released on Aug. 31, the NFL’s cut-down day for teams to get to a 53-man regular-season roster.