With second round pick Mikel LeShoure done for the year (and possibly longer). Do the Lions need to sign another running back? Lets look at who is on the roster 

Jahvid Best

Maurice Morris

Preston Dial

Aaron Brown

Matt Clapp

Ian Johnson

Jerome Felton

Okay Felton, Clapp, Dial are FB but I listed them anyway. Keep in mind, Dial is a FB/TE hybrid that was known as a good pass and run blocker before he was injured. I would put him over Felton personally.

The running backs. We've all seen Best and Morris, and hopefully we're all comfortable with them. Aaron Brown has shown flashes and is having a pretty good camp from all accounts. The one we really don't know much about on the list is Ian Johnson. He's a former Boise State player who is most known for proposing to his girlfriend on the field. His best on field performance came in 2006 when he rushed for 240 and 5 touchdowns against Oregon State. 

Pre-draft measureables

Ian Johnson Pre-draft measureables

Ht	Wt	40-yd dash	10-yd split	20-yd split	20-ss	3-cone	Vert	Broad	BP	Wonderlic
5 ft 11¼ in	212 lb	4.46 s	1.46 s	2.55 s	4.18 s	6.86 s	33 in	9 ft 8 in	26 rep	26
3-cone and broad jump from Boise State Pro Day, all others from NFL Combine.[6]

He ran the fastest 40 yard time for running backs at the 2009 combine. As you can see, he's bigger then Best but slightly smaller then LeShoure (height wise he's 3/4in shorter and weight 18lbs lighter)

He's spent time with Minnesota and Arizona. Is he worth a look, or do you guys have any other options in mind? 

By the way, yes, my bias for Boise State makes me want to let this guy give it a go.