Jeremiah's latest mock has the Ravens taking Cooper DeSean, corner/safety out of Iowa.
6'-1, 210 pounds. Good height and size, timed a bit slow, 4.5, but he does seem to play faster than he times. Very good instincts, which allows him to play free, faster.
Excellent return man as well.
He could seemingly back up corner and safety, and be a return guy, not a bad pick at 30 if they go that route.