First game is 10 days away...
That week, prior to gameday when they set their roster for that game...
THAT's when they will decide WHICH X-receiver will be called up as the 5th WR...
It WILL be one of them (I'm just guessing here... but I firmly believe on gameday it'll be 5 WR's and they're just biding time until they need to make that decision...), IMO.
My guess is Allen Robinson will start off as the gameday X. Veteran, should pick up the play book quickly. They only need him as a blocking WR and as a dump-off for a few passes and maybe a 1st down or end-zone "my WR is bigger than your 5'8" CB" catch or two. I'm confidant AR II can do what's needed as a stopgap.
Is DPJ injured, or hiding an injury? Why was he so ineffective in the preseason games? He, actually, STILL has a shot with this team/ coaching staff...? Things that make me go hmmm, I have to think about that!
I think Tim Patrick, once he gets up to playbook and Goff-is-comfy-with-him speed will be the guy.
But if I'm thinking about it... that's why we still have DPJ and signed AR II. If Patrick gets nicked up again, for one game or many, these two are fallback options.