He wasn't immediately signed to a contract.
Scott, 29, hasn't played this season since being released by the Bengals.
Last season, he played in two games Cincinnati and rushed for 35 yards on eight carries.
For his career, Scott has rushed for 1,035 yards and four touchdowns in four NFL seasons. He's caught 29 passes for 165 yards.
Scott is a 2009 Bengals sixth-round draft pick from Abilene Christian.
The Ravens' running game has struggled, but it's unclear if Scott would provide an upgrade.