If Anthony is also called up, it makes Campbell in CF less of an option, and now "rotating" Mayer around the infield is very problematic.
Someone would have to go (via trade or IL) to make room for both top prospects, and that's not even bringing up Yoshida.
13 Everyday players
C: Narvaez/Wong
1B: Casas (Romy)
2B: Campbell, Mayer (DHam)
SS: Story, Mayer
3B: Bregman, Mayer
LF: Anthony, Duran
CF: Duran, Rafaela,
RF: Abreu, Refsnyder, Anthony
DH: Devers
Without Romy and DHam, there is room for 13, but how do the top 3 prospects play 75-80% or more of the time, and if so, at whose expense?
The obvious players losing playing time would be Rafaela & Refsnyder (UGH!) but what infielder? None of these guys can play 1B, except Casas.