Assuming only Houck starts the season on the IL, this could be our opening day roster:
SP: Crochet, Suarez, Gray, Bello, Sandoval (IL?)
RP: Chapman, Whitlock, Slaten, Weissert, Crawford, Oviedo, Waton (Rule5) & Moran (no options)
C: Narvaez & Wong
1B: Contreras
2B: Romy & DHam
3B: Mayer & Eaton
SS: Story
LF: Anthony & Duran (DH)
CF: Rafaela
RF: Abreu
DH: Yoshida
AAA/AA on the 40:
Harrison, Tolle, Early, Uberstine, Drohan, Bennett, Kelly, Samaniego
Casas (IL?), K Campbell & Sogard
2 open slots on the 40, as of now. (Thaiss & Romero are possibilities, but I think we add 2 from outside the system: 3B/2B and RP.)