1990 Houston Astros season

The Houston Astros' 1990 season was a season in American baseball. It involved the Houston Astros attempting to win the National League West.

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.

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 for Jeff Bagwell.
 * 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 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.

Regular season

 * - style="text-align:center;"
 * Legend:      = Win       = Loss       = Postponement Bold = Astros team member

Starters by position
''Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Other batters
''Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Starting pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Other pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Relief pitchers
Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts