With no more Aug 31 deadline, this is pretty much who the Astros will be, hopefully taking to the post season. The list is currently at 26.
Chris Devenski
Zack Greinke
Will Harris
Josh James
Collin McHugh
Wade Miley
Roberto Osuna
Brad Peacock
Ryan Pressly
Hector Rondon
Aaron Sanchez
Joe Smith
Justin Verlander
Robinson Chirinos
Martin Maldonado
Jose Altuve
Yordan Alvarez
Alex Bregman
Carlos Correa
Aledmys Diaz
Yuli Gurriel
Michael Brantley
Jake Marisnick
Josh Reddick
George Springer
Myles Straw
In terms of pitching, I think anyone not named Pressly or Osuna is going to be fighting for that last reliever spot.