Preliminary Astros list below the fold. This one is actually not too long, which is good because I need space considering how many prospects I've written up for other teams.

Houston Astros             36 players

Juan Abreu                 RHP
Ruben Alaniz               RHP
Jack Armstrong Jr          RHP
Jay Austin                 OF
Adam Bailey                OF
James Buchanan             RHP
Tanner Bushue              RHP
Xavier Cedeno              LHP
Paul Clemens               RHP
Jarred Cosart              RHP
Jorge De Leon              RHP
Delino DeShields Jr        2B
Mike Foltynewicz           RHP
Jake Goebbert              OF
Kyle Hallock               LHP
Adrian Hauser              RHP
Kody Hinze                 1B
Dallas Keuchel             LHP
Mike Kvasnicka             3B
Chris Lee                  LHP
Jiovanni Mier              SS
Telvin Nash                1B
Brett Oberholtzer          LHP
Luis Ordisgoitti           RHP
Ariel Ovando               OF
Jimmy Paredes              2B
Domingo Santana            OF
Ross Seaton                RHP
J.B Shuck                  OF
Jonathan Singleton         1B-OF
Jordan Scott               OF
George Springer            OF
Nick Tropeano              RHP
Jonathan Villar            SS
Austin Wates               OF
Josh Zeid                  RHP