Summary: The Clinton, Iowa, native was a key contributor in each of his four seasons, increasing production directly with his workload and claiming school records in all-purpose yards, rushing yards and touchdowns. The 5.4 yards per carry over the course of his career is impressive, as is his solid threat as a receiver. He responded well in adding kickoff return duties to his palette as a senior, and that might prompt NFL teams to test him in that role.

Stacking up: Johnson is not listed among the top five prospects at the position by NFL Media analysts Mike Mayock or Bucky Brooks. This running back class is viewed to be a deep pool of talent. Johnson's performances in front of the entire NFL at the Senior Bowl in January and the combine in February likely helped his status for some point in the draft.

First in almost 50 years?:Northern Iowa hasn't had a running back selected in the NFL Draft since 1966 (Randy Schultz, Cleveland, fifth round, 74th overall).