Of the 13 (you can look above at the Football Drop down list and check out who is on the roster)
My opinion -Stahl, Spencer, Estrella won't see much PT. So, that is 3 less (and I don't think they are on scholarships), leaving 10 with meaningful PT opportunity.
Meiga has only seen real action on ST, and seems to be content with that. So, that leaves 9 with meaningful PT opportunity.
I think Ivey and Johnson will be mostly ST, as they wait for the guys ahead of them to move on. So, that leaves 7 with meaningful PT opportunity.
KLS, Wallace and perhaps Cephas will be your starting 3, since you play 3 WRs at a time. That leaves you with 4 to back them up. And they are a RS -FR (Saunders), RS-So (Clifford), So - Evans, Jr (without much production) McClain. None of these guys (perhaps with the exception of Evans) has shown/had a chance to prove themsevles.
Yeah, I could see needing an experienced receiver in the portal.
The scholly limit is another issue.