I’m not sure about Hatch this year. Every time I see him wearing that large leg brace I wonder how it will affect his speed and movement. He was a good blocker so maybe use him on designed runs or swing passes.I think he's definitely starting, probably at the Slot-WR.
I'm guessing Gill and Hatcher split some time at the X-WR and probably are listed as Or. I'm guessing Gill gets a little more of the share.
Cook starts at the Slot-WR.
JRS starts at the Z-WR. Hornsby will be second string at the Z-WR
E. Ross is first up for any 4 WR formations and probably next up at the slot and could get some snaps at the X as well. I don't think E. Ross is top 3 but can get some snaps at any of the WR positions. His size and skill fits pretty much at any of the spots. He'll still play a lot.