after the Machado DFA, my speculation on the bullpen is
Finnegan / Harvey / Edwards - closer and set ups with a close lead. Davey will play the matchups.
Espino, Ward, Erasmo - multi inning, long, low leverage, spot starts.
2 slots for some combo of Arano, Thompson, Cronin, Doo, abbott, Ferrer.
I think Abbott most likely is stretched out in AAA until needed for a spot start. Ferrer and Cronin pitch in Rochester. Weems could be on this list but is behind Thompson. I could also very easily see a healthy Arano having a trade market. Similar for Edwards.
If they want to go north with a lefty, it's one of Doo, Cronin, or Ferrer.