Per Levine, the list of Astros prospects in the Fall Instructional League (roster to be split into two squads):
LINK (and since I'm doing a lot of cutting and pasting here - more than I'm typically comfortable with - give the link a courtesy click... thanks!)
Pitchers: Ruben Alaniz, Jake Buchanan, Tanner Bushue, David Carpenter, Jose Cisnero, Jorge De Leon, Bobby Doran, Brad Dydalewicz, Michael Feliz, Michael Foltynewicz, Evan Grills, Zach Grimmett, Dallas Keuchel, Arcenio Leon, Juan Minaya, Jose Montero, Luis Ordosgoitti, Jose Perdomo, Juri Perez, Euris Quezada, Rodney Quintero, Francis Ramirez, James Robinson, Ebert Rosario, Ross Seaton, and Thomas Shirley.
Catchers: Rene Garcia, Ben Heath, Roberto Pena, and Chris Wallace.
Infielders: Jose Altuve, Tyler Burnett, Delino DeShields, Jose Fernandez, Enrique Hernandez, Michael Kvasnicka, Joshua Magee, Jonathan Meyer, Jiovanni Mier, Marcus Nidiffer, Jimmy Paredes, Kyle Redinger, and Jonathan Villar.
Outfielders: Daniel Adamson, Jay Austin, Telvin Nash, Ariel Ovando, Jordan Scott, Austin Wates, and Garen Wright.
Injury rehab: C Luis Alvarez, C Alfredo Gonzalez, and RHP Chia-Jen Lo.