Saints sign RB Lynn Bowden, WR Keke Coutee, and former Bengals 1st round OL Billy Price (edit: Price cut on 7/20, Coutee cut 8/11)

I am surprised we waived Malik Flowers. I thought for sure he would stick, being he can play as a RS & WR. Hopefully the Saints can get him on the PS later if he's still around.
Why would the Saints put him on the PS if they don’t even want him in camp?