Have to imagine Espino and Irvin get shots at the #5 spot soon
the problem is neither of them are doing well, either. I don't think they want to force Adon into the rotation again at this point, but he's the only one who is doing OK in Rochester. Peralta went 5 innings his last start (4/21), so maybe he gets another start or two before Kuhl gets DFA's to clear a spot for Peralta.
TBH, down a level, Rutledge has had 3 good starts and has gone 6 innings in his last one. It's premature, but he's on the 40 man roster. Maybe give Peralta first dibs, then think about Irvin or Rutledge depending on how they are going.
I know I'm sounding like you, but bumping Rutledge to AAA once he gets another 2-3 starts in Harrisburg ought to be on the table. BBs are a little high and he's a touch below 9 K/9, but he seems to be handling his level.