I think most teams see this:

SI_DougFarrar ‏@SI_DougFarrar 15h
I've watched a lot of Chris Borland, and... I don't know if he's going to fit in the NFL. Pros want LBs who are so much more athletic.

SI_DougFarrar ‏@SI_DougFarrar 15h
I get the whole Zach Thomas/Lofa Tatupu argument with Borland, but NFL 'backers have to play half-field at crazy speeds these days.

and that there are a few who would organize their D to keep Borland where he will be successful like Miami did with Thomas. But that kinda D is rare these days.