Who is better ROS? L. Murray or Duke Johnson?

I currently have Murray but I feel like he will not repeat numbers like he did against Arizona and with Cook coming back.

Duke Johnson Jr, Darren Sproles, Chris Ivory and Alfred Blue are all available. Which one of these guys would you pick up instead of Murray.

ORRRRR Should I risk picking up D’Onta Foreman for the future?

I currently have Gurley and Mixon so RB is not an immediate need.

Bumping this post