I think we've got a reasonably high floor for the bullpen. There's nobody that will come in now where I'm terrified every time (still terrified sometimes depending on how Trouty the batter is, obviously...).
Richards is probably the first one gone for me, but I suspect we can move him for something, rather than just DFA and waive, when the time is right. He's a good arm, just bottom rung for me.
The other day on the radio, I heard a suggestion that they should swap out Pop and Pearson, and have Pop close all season in AAA. He's certainly got the stuff to be a dominant high leverage guy, but the results aren't there yet, so maybe some seasoning in that role might be a decent idea.
Green and Pearson are going to raise both the floor and the ceiling of the pen, when they're ready (and I think Pearson is ready now, personally...)