already has solid RBs on his roster and this pickup will be a stash/depth add, Tank is much better. (although to be honest I'd still be tempted to start Tank over Dowdle right away)
I just don't think Dowdle is very good. He's averaged 4.1 ypc this year and Tank is averaging 8.0 - obviously that isn't sustainable, but I see Tank as having league-winning potential if Etienne gets hurt. He's just a much better player.