According to this National Football Post article, the Lions are investing some time into Southern Illinois running back Deji Karim. Karim was not invited to the combine, but worked out for scouts at Northwestern's pro day.
He is 5'9 and 209 lbs, and ran a 4.37 40 at the workout. He also had a 10'3" broadjump, a 40" vertical, and all of the drills he performed would have ranked him in the top 3 amongst running backs at the combine.
With his stature at 5'9" and 209 lbs, I couldn't help but think of Barry. Here is an interview with him on a local news station.
National Football Post has Karim ranked 11th amongst running backs.
You can check out some highlights in his game against Western Illinois in this youtube clip.