At Rochester, there's a number of other candidates, but Espino, Irvin, Abbott, Adon, might be the favorites, with Wily Peralta if he sticks around and they want to keep him stretched out. I'm not sure of Tetrault's health, but he might be another candidate. Cole Henry would be a candidate once he is healthy.
As far as the MLB roster, they have 26 lined up, but the hang up is whether there's any guy on waivers from other teams who they might like. The bench is penciled in as Riley Adams, Vargas, Call, and Michael Chavis, but they picked up Chad Pinder from the Reds who might bump Chavis.
As for the bullpen, there are 5 solids (Finnegan, Edwards, Harvey, Erasmo Ramirez, and Thad Ward), plus 3 current likelies: Banda as a the lefty, Mason Thompson, and Hobie Harris. I guess Harris is one of the camp surprises who was not on the radar before the spring. Banda throws hard but has always had poor command. It'll be interesting to watch his walk totals.