Still hard for me to imagine them bringing Joyce back. Velasquez also has to be activated or DFA'ed at some point. I'm hoping Bedrosian wins himself the spot, presumably over De Los Santos. And Rosso could also be optioned (to flip-flop with VV or Seranthony) if they can keep him on the 40.
Eflin could also go on the 60-day.
Vierling may be better but we already have a LH 1B and two LH CFs. The real choice there long-term is probably Bonaficio vs. Williams. Though if Marchan keeps it up he should probably stay, let Knapp PH and play 1B a bit (I know others will chime in and say they should release Knapp, but that's not gonna happen).