The 6-foot-2, 230-pound former Ohio State standout was cut by the Cardinals in March. He tried out for the New York Giants this season but wasn't signed.
The Ravens have struggled to run the football this season as running back Ray Rice has dealt with a strained left hip flexor and the offensive line hasn't created big holes for him to run through.
The health of backup running back Bernard Pierce is another factor. Pierce is dealing with a recurring hamstring injury that has limited him this season, Sunday against the Pittsburgh Steelers and this week in practice.