Any insight into who was getting more first team RB touches in the bye week practices?

Deciding whether or not to flex Dameon Pierce for fantasy…Amari Cooper is the other option but I don’t trust PJ Walker throwing to him on the road and the Seahawks D has been stout recently. Plus the Carolina run D is trash so I could see Pierce and Singletary both having big days. It’s a half-PPR league.

I appreciate any help!!