Offseason

• October 24, 1975: The Astros traded players to be named later to the Cincinnati Reds
  Cincinnati Reds
  The Cincinnati Reds are a Major League Baseball team based in Cincinnati, Ohio. They are members of the National League Central Division. The club was established in 1882 as a charter member of the American Association and joined the National League in 1890....
  
   for Joaquín 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:...
  
  . The Astros completed the trade by sending Luis Sánchez
  Luis Sánchez
  This article is about a baseball player; for other people with the same name, see Luis Sanchez Luis Mercedes Escobar Sánchez , nicknamed "Escoba" , was a relief pitcher in Major League Baseball who played for the California Angels. He also played in Japan for the Yomiuri Giants...
  
   and Carlos Alfonso (minors) to the Reds on December 12.
• December 6, 1975: Milt May
  Milt May
  Milton Scott May is a former professional baseball player and coach who played in the Major Leagues from to for the Pittsburgh Pirates, Houston Astros, Detroit Tigers, Chicago White Sox, and San Francisco Giants. May was a catcher who hit for a fairly high batting average during the era in which...
  
  , Dave Roberts
  Dave Roberts (pitcher)
  David Arthur Roberts was an American left-handed pitcher in Major League Baseball who played for eight teams from 1969 to 1981. He was second in the National League with a 2.10 earned run average in for the San Diego Padres, after which he was traded to the Houston Astros, where he spent the...
  
   and Jim Crawford
  Jim Crawford (baseball)
  James Frederick Crawford is a former professional baseball pitcher. Crawford pitched in all or part of five seasons in Major League Baseball between 1973 and 1978. He appeared in 181 games, all but 14 in relief....
  
   were traded by the Astros to the Detroit Tigers
  Detroit Tigers
  The Detroit Tigers are a Major League Baseball team located in Detroit, Michigan. One of the American League's eight charter franchises, the club was founded in Detroit in as part of the Western League. The Tigers have won four World Series championships and have won the American League pennant...
  
   for Leon Roberts
  Leon Roberts
  Leon Kauffman Roberts is a former major league outfielder who played for the Detroit Tigers , Houston Astros , Seattle Mariners , Texas Rangers , Toronto Blue Jays , and Kansas City Royals...
  
  , Terry Humphrey
  Terry Humphrey
  Terryal Gene Humphrey is a former professional baseball player who played nine seasons for the Montreal Expos, Detroit Tigers, and California Angels of Major League Baseball.-References:...
  
  , Gene Pentz
  Gene Pentz
  Eugene David Pentz is a former Major League Baseball pitcher. He played all or part of four seasons in the majors, from until for the Detroit Tigers and Houston Astros.-External links:...
  
   and Mark Lemongello
  Mark Lemongello
  Mark Lemongello is a retired professional baseball player who pitched in the Major Leagues from 1976-1979. He played for the Houston Astros and the Toronto Blue Jays...
  
  .

Notable transactions

• June 6, 1976: Terry Humphrey and Mike Barlow
  Mike Barlow
  Michael Roswell Barlow is a retired professional baseball player who played seven seasons for the St. Louis Cardinals, Houston Astros, Los Angeles Angels, and Toronto Blue Jays of Major League Baseball....
  
   were traded by the Astros to the California Angels
  Los Angeles Angels of Anaheim
  The Los Angeles Angels of Anaheim are a professional baseball team based in Anaheim, California, United States. The Angels are a member of the Western Division of Major League Baseball's American League. The "Angels" name originates from the city in which the team started, Los Angeles...
  
   for Ed Herrmann
  Ed Herrmann
  Edward Martin Herrmann is a former American professional baseball player. He played in the Major Leagues as a catcher for the Chicago White Sox, the New York Yankees, the California Angels, the Houston Astros and the Montreal Expos from 1967 to 1978...
  
  .
• June 8, 1976: 1976 Major League Baseball Draft
  1976 Major League Baseball Draft
  -First round selections:The following are the first round picks in the 1976 Major League Baseball draft.* Did not sign- Background :The 1976 Arizona State University team, considered by many to be the best collegiate team ever, played a major role in the draft. Floyd Bannister was picked number one...
  
  
  • Floyd Bannister
    Floyd Bannister
    Floyd Franklin Bannister is a former Major League Baseball left-handed pitcher. During a 15-year baseball career, he pitched for the Houston Astros , Seattle Mariners , Chicago White Sox , Kansas City Royals , California Angels , and the Texas Rangers .-History:In 1973, as a high school...
    
     was drafted by the Houston Astros in the 1st round (1st pick).
  • Gary Rajsich
    Gary Rajsich
    Gary Louis Rajsich is an American Major League Baseball scout and a former professional baseball outfielder. He played all or part of four seasons in the Majors from until , then played three additional seasons for the Chunichi Dragons from until...
    
     was drafted by the Astros in the 11th round.
  • Bert Roberge
    Bert Roberge
    Bertrand Roland Roberge is a former Major League Baseball pitcher. Roberge pitched all or part of six seasons in the majors between until .-Sources:...
    
     was drafted by the Astros in the 17th round.

Roster

Starters by position

Other batters

Starting pitchers

Other pitchers

Relief pitchers

Farm system