Minnesota running back David Cobb hurt his stock for the 2015 NFL Draft today. While nobody expected him to blaze, they did expect him to do better than a 4.81 40-yard dash. When you have NFL aspirations at running back you really need to beat more than just the full backs. Pro Day will be huge for the youngster to repair his stock.
It should be noted that he did look hobbled after the attempt but the time is recorded for history.