Deone Buchanon?? WTF Drop or keep as DB?

I can play Buchanon as a DB but his numbers are killing me.  There are plenty of guys on the wire to pick up like Harrison Smith, Burnett, Bethea, Karl Joseph...  Should I play match-ups week to week or keep Buchanon in lineup?  Thx

I'd dump him for Harrison Smith or Burnett. Probably Smith as he doesn't have the injury history.