Butler vs McFadden

Hi Guru! 2nd yr CB Butler had 9 tackles tonight. Do you think it is just an aberration of pre-season game or something to watch for?  B McFadden has been a stud CB in Pit. Which CB would you rather target?

Both of these Pit CBs are available as free agents. My CBs are McCourty, Quin and Munnerlyn. Stay put or drop/pick up one of Pit CBs?

I would stick with what you have. Butler's performance was likely an aberration.