Offseason
- December 6, 1989: Bill Gullickson was signed as a free agent by the Astros.
- December 19, 1989: Dan Schatzeder was signed as a free agent by the Astros.
- March 13, 1990: Dave Silvestri and a player to be named later were traded by the Astros to the New York Yankees for Orlando Miller. The Astros completed the deal by sending Daven Bond (minors) to the Yankees on June 11.
Read more about this topic: 1990 Houston Astros Season