rank DBs ROS

How would you rank these 3 DBs for ROS assuming you may only be able to keep one on your roster as they all have a week 4 bye?

Ward
Whitner
Mathieu

Side question: which LB would you drop from Preston Brown and Jelani Jenkins?

Whitner
Ward
Mathieu

I like Brown's upside more but he carries more risk with an unknown role moving forward. That said, if you have strength at linebacker, go with the upside of Brown. If you need this LB to be an every week starter right now, go with Jenkins as the person you keep.