which is way more important than upper body strength. Look at the running back from LSU this past year. His strength in the legs was unmatched. Usually running backs just need an opportunity to showcase what they have. Armstrong does have a strong skill set. I loved Tony Jones toughness and determination and no one wanted to tackle him if he broke into the secondary. The problem was he turned a lot of big runs into 4 yard gains where he had good blocking. Timing to the hole created which is a function of vision are very key in running backs, which Jones lacked but I think it is there for C'Bo in particular and his leg strength to finish TDs is apparent too.