MiLB announced the Astros' organizational all-stars today. Click the link for the full breakdown, but here you have them by position:
Catcher: Jacob Nottingham (RIP)
First Base: A.J. Reed
Second Base: Tony Kemp
Third Base: Matt Duffy
Shortstop: Jonathan Villar (the Astros should call this kid up and see what they have in him, imo)
Outfielders: Derek Fisher, Jon Kemmer, Brett Phillips (RIP)
Utility/DH: Tyler White
RHP: Joe Musgrove
LHP: Bryan Radziewski
Reliever: Jandel Gustave