By Shawn Childs Keep an eye on health status of Dalvin Cook and David Montgomery. Some thoughts on running backs in Week 4: Dalvin Cook__, [Minnesota Vikings](https://www.si.com/nfl/team/minnesota-vikings)__The injury to Cook doesn’t look as bad as it appeared on Sunday\. The Vikings listed him as questionable for Sunday’s game with a shoulder issue\. I will give him 55% of their running attempts until I have a better update on his status\. Alexander Mattison will get a nice bump this weekend if Cook can’t play\. Ty Chandler is also a player to keep an eye on\. David Montgomery__, [Chicago Bea…