What RBs need to improve

Updated: February 11, 2003, 2:12 PM ET
Editor's Note: As the NFL combine approaches, Mel Kiper Jr. identifies some questions faced by the draft's top 10 running back prospects (listed in order from top to bottom) -- and what they can do to improve their stock. The combine is Feb. 18-24. The draft takes place Saturday, April 26 (rounds 1-3) and Sunday, April 27 (rounds 4-7).

Larry Johnson -- Penn State
The big question is whether or not he is a one-year wonder.Johnson went from 358 yards in 2001 to 2,087 yards last season, and you wonder if this is a player who simply did his best work against the Indianas and Michigan State's of the world. He is also a bit of a straight-line runner who has to get a little stronger, but the big thing here is whether he can step up against the best opponents.