Offseason

• December 6, 1989: Bill Gullickson
  Bill Gullickson
  William Lee Gullickson is a former major league baseball pitcher who played for six different major-league teams, in Canada, the U.S...
  
   was signed as a free agent by the Astros.
• December 19, 1989: Dan Schatzeder
  Dan Schatzeder
  Daniel Ernest Schatzeder is a former professional baseball player who pitched in the major leagues from - for nine different teams. Schatzeder played college baseball at the University of Denver...
  
   was signed as a free agent by the Astros.
• March 13, 1990: Dave Silvestri
  Dave Silvestri
  David Joseph Silvestri was an infielder in Major League Baseball from 1992 to 1999. He also played on the United States Baseball team at the 1988 Summer Olympics.- External links :...
  
   and a player to be named later were traded by the Astros to the New York Yankees
  New York Yankees
  The New York Yankees are a professional baseball team based in the The Bronx, New York. They compete in Major League Baseball in the American League's East Division...
  
   for Orlando Miller
  Orlando Miller
  Orlando Miller Salmon , is a former professional baseball player who played in Major League Baseball primarily as a shortstop from 1994-97.Orlando Miller got his pro career started in the minor leagues in 1991...
  
  . The Astros completed the deal by sending Daven Bond (minors) to the Yankees on June 11.

Notable transactions

• April 3, 1990: Roger Mason was released by the Houston Astros.
• August 30, 1990: Larry Andersen was traded by the Astros to the Boston Red Sox
  Boston Red Sox
  The Boston Red Sox are a professional baseball team based in Boston, Massachusetts, and a member of Major League Baseball’s American League Eastern Division. Founded in as one of the American League's eight charter franchises, the Red Sox's home ballpark has been Fenway Park since . The "Red Sox"...
  
   for Jeff Bagwell
  Jeff Bagwell
  Jeffrey Robert Bagwell , is a former American professional baseball player and coach. He played his entire fifteen-year Major League Baseball career as a first baseman for the Houston Astros and was a four-time All-Star...
  
  .
• August 30, 1990: Bill Doran was traded by the Houston Astros to the Cincinnati Reds for players to be named later.
• September 10, 1990: Dan Schatzeder was traded by the Astros to the New York Mets
  New York Mets
  The New York Mets are a professional baseball team based in the borough of Queens in New York City, New York. They belong to Major League Baseball's National League East Division. One of baseball's first expansion teams, the Mets were founded in 1962 to replace New York's departed National League...
  
   for Nick Davis (minors) and Steve LaRose (minors).
• September 7, 1990: Butch Henry was sent by the Cincinnati Reds to the Houston Astros to complete an earlier deal made on August 30, 1990. Catcher Terry McGriff was also sent by the Cincinnati Reds to complete the deal.

Roster

Starters by position

Other batters

Starting pitchers

Other pitchers

Relief pitchers

Farm system