Offseason

• October 13, 1987: Ronn Reynolds
  Ronn Reynolds
  Ronn Dwayne Reynolds was a Major League Baseball catcher, who played for the New York Mets, Philadelphia Phillies, Houston Astros and San Diego Padres. After playing college baseball at the University of Arkansas, Reynolds was drafted by the Oakland Athletics in the 5th round in 1979...
  
   was released by the Houston Astros.
• January 8, 1988: Joaquin Andújar
  Joaquín Andújar
  Joaquín Andújar is a former Major League Baseball right-handed starting pitcher who became one of the most dominant pitchers in baseball while playing with the St. Louis Cardinals in the mid-80s.-Early years:...
  
   was signed as a free agent by the Astros.
• March 10, 1988: Ernie Camacho
  Ernie Camacho
  Ernest Carlos Camacho is a former professional baseball player who pitched in the Major Leagues from 1980–1981 and 1983-1990.In 1984, Camacho lead the Cleveland Indians in saves with 23.-External links:...
  
   was signed as a free agent by the Astros.
• March 25, 1988: Robbie Wine
  Robbie Wine
  Robert Paul Wine, Jr. is an American former Major League Baseball player. A catcher, Wine played for the Houston Astros in and . He last played professional baseball in ....
  
   was traded by the Astros to the Texas Rangers
  Texas Rangers (baseball)
  The Texas Rangers are a professional baseball team in the Dallas-Fort Worth Metroplex, based in Arlington, Texas. The Rangers are a member of the Western Division of Major League Baseball's American League, and are the reigning A.L. Western Division and A.L. Champions. Since , the Rangers have...
  
   for Mike Loynd
  Mike Loynd
  Michael Loynd was a Major League Baseball pitcher with the Texas Rangers.-College career:He was drafted in June 1986 out of Florida State University and made the jump from college to the big leagues in less than two months...
  
  .

Notable transactions

• July 23, 1988: Mark Bailey
  Mark Bailey (baseball)
  John Mark Bailey is a former catcher in Major League Baseball who played for the Houston Astros and San Francisco Giants.Bailey became a bullpen coach for the Astros in 2002.-Sources:...
  
   was traded by the Astros to the Montreal Expos
  Washington Nationals
  The Washington Nationals are a professional baseball team based in Washington, D.C. The Nationals are a member of the Eastern Division of the National League of Major League Baseball . The team moved into the newly built Nationals Park in 2008, after playing their first three seasons in RFK Stadium...
  
   for Casey Candaele
  Casey Candaele
  Casey Todd Candaele is a former Major League Baseball player from 1986 to 1997 for the Montreal Expos, Houston Astros, and Cleveland Indians. Candaele was known as a versatile utility player who could play many infield and outfield positions. His mother, Helen Callaghan St...
  
  .
• August 31, 1988: Denny Walling
  Denny Walling
  Dennis Martin Walling is a former Major League Baseball player. Walling played all or part of eighteen seasons in the majors, from 1975 to 1992. He played his most games as a third baseman, but also saw significant time as an outfielder and first baseman.Walling may be best known as a...
  
   was traded by the Astros to the St. Louis Cardinals
  St. Louis Cardinals
  The St. Louis Cardinals are a professional baseball team based in St. Louis, Missouri. They are members of the Central Division in the National League of Major League Baseball. The Cardinals have won eleven World Series championships, the most of any National League team, and second overall only to...
  
   for Bob Forsch
  Bob Forsch
  Robert Herbert Forsch was an American right-handed starting pitcher who spent most of his sixteen years in Major League Baseball with the St. Louis Cardinals before finishing his playing career with the Houston Astros...
  
  .

Draft picks

• June 1, 1988: 1988 Major League Baseball Draft
  1988 Major League Baseball Draft
  -First round selections:The following are the first round picks in the 1988 Major League Baseball draft.-Supplemental First Round Selections:-External links:*...
  
  
  • 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 :...
    
     was drafted by the Astros in the 2nd round. Player signed October 18, 1988.
  • Kenny Lofton
    Kenny Lofton
    Kenneth Lofton is a former Major League Baseball outfielder known for his great speed on the base paths as well as in the field, award-winning defensive play , timely hitting, and playful spirit. He batted and threw left-handed...
    
     was drafted by the Astros in the 17th round. Lofton signed on June 16, 1988.

Miscellaneous

Roster

Starters by position

Other batters

Starting pitchers

Other pitchers

Relief pitchers

Farm system