The AAA roster on milb.com has been updated; appears to be an actual Opening Day roster:
Pitchers
Appel, Mark
Barrett, Aaron
Bedrosian, Cam
Crouse, Hans
Cyr, Tyler
Dohy, Kyle
Duron, Nick
Eastman, Colton
Gatto, Joe
Hernandez, Jakob
Maples, Dillon
Marvel, James
Moss, Scott
Newberry, Jake
Ogle, Braeden
Sanchez, Ricardo
Singer, Jeff
Zarbnisky, Braden
Catchers
Cabral, Edgar
Sands, Donny
Wynns, Austin
Infield
Castillo, Ali
Guthrie, Dalton
Hall, Darick
Maggi, Drew
Munoz, Yairo
Toffey, Will
Outfield
Andreoli, John
Bonifacio, Jorge
Williams, Justin