Notable transactions

• April 27, 1984: J. R. Richard was released by the Astros.
• May 25, 1984: Alan Bannister
  Alan Bannister
  Alan Bannister is a retired professional baseball player who played for the Philadelphia Phillies , Chicago White Sox , Cleveland Indians , Houston Astros and Texas Rangers...
  
   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 Richardt
  Mike Richardt
  Michael Anthony Richardt is a former Major League Baseball second baseman. He played all or part of four seasons in the majors, between and , mostly for the Texas Rangers. He also played in 16 games for the Houston Astros at the end of the 1984 season....
  
  .
• June 4, 1984: 1984 Major League Baseball Draft
  1984 Major League Baseball Draft
  -First round selections:The following are the first round picks in the 1984 Major League Baseball draft.- Other notable players :*Future Canadian Football League quarterback Damon Allen, was drafted by the Detroit Tigers in the seventh round, 182nd overall....
  
  
  • Ken Caminiti
    Ken Caminiti
    Kenneth Gene Caminiti was an American third baseman in Major League Baseball and the 1996 National League Most Valuable Player. He was born in Hanford, California, and attended San Jose State University...
    
     was drafted by the Astros in the 3rd round. Player signed June 9, 1984.
  • John Vander Wal
    John Vander Wal
    John Henry Vander Wal is a former American Major League Baseball left-handed hitter who played outfield and first base for eight different teams over 14 seasons.-Early life:...
    
     was drafted by the Astros in the 8th round, but did not sign.
• July 4, 1984: Scott Loucks
  Scott Loucks
  Scott Gregory Loucks is a former Major League Baseball outfielder. He played parts of five seasons in the majors between and . In none of those seasons did he accumulate more than 49 at bats or 11 hits. Both of those high-water marks came in for the Houston Astros, when he was used in 44 games,...
  
   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 Brad Mills.
• August 28, 1984: Ray Knight
  Ray Knight
  Charles Ray Knight is a former right-handed Major League Baseball third baseman best remembered for his time with the Cincinnati Reds and New York Mets...
  
   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 players to be named later. The New York Mets completed the trade by sending Gerald Young
  Gerald Young
  Gerald Anthony Young was a Major League Baseball outfielder. He was noted for his long strides and blazing speed, and although considered somewhat of a "hot dog" because of what appeared to be a lackadaisical style , he was considered one of the best defensive center fielders of his time...
  
   and Manuel Lee
  Manuel Lee
  Manuel Lora Lee is a former shortstop and second baseman for Major League Baseball's Toronto Blue Jays , Texas Rangers and St. Louis Cardinals...
  
   to the Astros on August 31 and Mitch Cook (minors) to the Astros on September 10.

Roster

Starters by position

Other batters

Starting pitchers

Other pitchers

Relief pitchers

Farm system