Outside of Alex Smith, you're unlikely to find a more controversial player in the comments section of this site than Knile Davis.
On the surface that seems a tad absurd. A backup running back isn't exactly the most important position in the world. It seems about as silly as arguing about backup quarterback or a fifth string corner (what do you MEAN we do that too?). But put Knile Davis's name in a column and you're likely to see opinions vary from "Knile is one of the best backup running backs in the NFL" to "Knile sucks and should be replaced.