They have excellent depth everywhere except in the pen I think. They have SP who can pitch in the pen and do well, but in terms of pure pen arms there's not much in Iowa. Injuries are to be expected i agree, including in the rotation, which makes the pen and pen depth weaker if Assad/Brown/Smyly etc have to start instead of being in the pen. Gotta assume there's always going to be 1 or 2 guys on the shelf.
I think the pen depth is a bit of a concern, though nothing to worry too much about yet. Edwards Jr and Escobar aren't exactly reassuring. Wieck has potential, and there may be others. Maybe some younger guys in minors come out of nowhere to shine.