Offseason
- October 13, 1987: Ronn Reynolds was released by the Houston Astros.
- January 8, 1988: Joaquín Andújar was signed as a free agent by the Astros.
- March 10, 1988: Ernie Camacho was signed as a free agent by the Astros.
- March 25, 1988: Robbie Wine was traded by the Astros to the Texas Rangers for Mike Loynd.
Read more about this topic: 1988 Houston Astros Season