re: How is Trent Richardson such an awful NFL running back?

He runs hard but not smart.

In college play he was usually much stronger than the opposing defenders, so running through them largely worked.

In the NFL that does not work.

Lacy is a good example of a hard runner that looks to cut.

You should try to avoid contact whenever possible, and only run through it when that's he only option.

TRich's first instinct is to bulldoze and that isn't good in the NFL.