Offseason

• December 8, 1988: Tracy Jones
  Tracy Jones
  Tracy Donald Jones , is a former professional baseball player who played in the Major Leagues primarily as an outfielder from 1986-1991. Jones was drafted by the New York Mets in the 4th round of the 1982 amateur draft, but did not sign...
  
   was traded by the Expos to the San Francisco Giants
  San Francisco Giants
  The San Francisco Giants are a Major League Baseball team based in San Francisco, California, playing in the National League West Division....
  
   for Mike Aldrete
  Mike Aldrete
  Michael Peter Aldrete is a former first baseman/outfielder in Major League Baseball.Aldrete was a four-year letterman at Stanford University...
  
  .
• December 8, 1988: John Dopson
  John Dopson
  John Robert Dopson, Jr. , is a former professional baseball player who pitched in the Major Leagues from 1985 and 1988-1994. Now he is a pitching instructor...
  
   and Luis Rivera were traded by the Expos 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 Spike Owen
  Spike Owen
  Spike Dee Owen is a former shortstop in Major League Baseball who played for the Seattle Mariners , Boston Red Sox , Montreal Expos , New York Yankees and California Angels...
  
   and Dan Gakeler
  Dan Gakeler
  Daniel Michael Gakeler is a former major league baseball pitcher. Although he spent eleven seasons in the minor league organizations of three different teams, he would spend just one season on a big league roster....
  
  .

Regular season

• August 23, 1989: The Expos and Los Angeles Dodgers
  Los Angeles Dodgers
  The Los Angeles Dodgers are a professional baseball team based in Los Angeles, California. The Dodgers are members of Major League Baseball's National League West Division. Established in 1883, the team originated in Brooklyn, New York, where it was known by a number of nicknames before becoming...
  
   engage in a 22 inning marathon, the longest game in Expos history. It eventually ended when Rick Dempsey
  Rick Dempsey
  John Rikard Dempsey is an American former professional baseball player. He played for 24 seasons as a catcher in Major League Baseball from to , most notably for the Baltimore Orioles...
  
   homered for the Dodgers in the top half of the 22nd innings off Dennis Martínez
  Dennis Martínez
  José Dennis Martínez Emilia , nicknamed "El Presidente" , is a former Major League Baseball pitcher...
  
   in a very rare relief performance. Rex Hudler
  Rex Hudler
  Rex Allen Hudler is a former Major League Baseball utility player. He played a total of thirteen seasons after being a first round draft pick of the New York Yankees in 1978.-Playing career:...
  
   was caught stealing second in the bottom half of the 22nd to end the game. The game would have ended earlier when an Expo scored from third on a sacrifice fly. The Dodgers' appeal, that the runner left the base too soon, was recognized by the third base umpire and the third out was recorded. The game also marked the first time that a mascot was ejected by an umpire. Youppi!, dressed in a nightgown and nightcap, pretended to go to sleep on top of the Dodgers dugout, former Montreal Royals
  Montreal Royals
  The Montreal Royals were a minor league professional baseball team located in Montreal, Quebec, that existed from 1897–1917 and from 1928–60 as a member of the International League and its progenitor, the original Eastern League...
  
   reliever and then coach of the Dodgers Tommy Lasorda
  Tommy Lasorda
  Thomas Charles Lasorda is a former Major League baseball player and manager. marked his sixth decade in one capacity or another with the Brooklyn/Los Angeles Dodgers organization, the longest non-continuous tenure anyone has had with the team, edging Dodger broadcaster Vin Scully...
  
   demanded that Youppi! be run from the game. In the end the game took over 6 hours to finish and ended close to 2:00 am.
• August 15, 1989: San Francisco Giants pitcher Dave Dravecky pitched three no-hit innings, but in the fifth inning, he felt a tingling sensation in his arm. In the sixth inning he started off shaky, allowing a home run
  Home run
  In baseball, a home run is scored when the ball is hit in such a way that the batter is able to reach home safely in one play without any errors being committed by the defensive team in the process...
  
   to the lead off batter and then hitting the second batter. Then, on his first pitch to Tim Raines
  Tim Raines
  Timothy Raines , nicknamed "Rock", is a former American professional baseball player. He played as a left fielder in Major League Baseball for six teams from 1979 to 2002 and was best known for his 13 seasons with the Montreal Expos...
  
  , his humerus
  Humerus
  The humerus is a long bone in the arm or forelimb that runs from the shoulder to the elbow....
  
   bone snapped, ending his career.

Opening Day starters

• Hubie Brooks
  Hubie Brooks
  Hubert Brooks, Jr. is a former Major League Baseball player. During his career, he played as a third baseman, shortstop and right fielder for the New York Mets , Montreal Expos , Los Angeles Dodgers , California Angels and Kansas City Royals .Brooks played varsity baseball...
  
  
• Tom Foley
• Andrés Galarraga
  Andrés Galarraga
  Andrés José Padovani Galarraga is a former Major League Baseball first baseman who played for the Montreal Expos , St. Louis Cardinals , Colorado Rockies , Atlanta Braves , Texas Rangers , San Francisco Giants and Anaheim Angels...
  
  
• Dave Martinez
  Dave Martinez
  David Martinez is a former outfielder in Major League Baseball who played for several teams from 1986 to 2001. He is currently the bench coach for the Tampa Bay Rays.-Career:...
  
  
• Dennis Martínez
  Dennis Martínez
  José Dennis Martínez Emilia , nicknamed "El Presidente" , is a former Major League Baseball pitcher...
  
  
• Spike Owen
  Spike Owen
  Spike Dee Owen is a former shortstop in Major League Baseball who played for the Seattle Mariners , Boston Red Sox , Montreal Expos , New York Yankees and California Angels...
  
  
• Tim Raines
  Tim Raines
  Timothy Raines , nicknamed "Rock", is a former American professional baseball player. He played as a left fielder in Major League Baseball for six teams from 1979 to 2002 and was best known for his 13 seasons with the Montreal Expos...
  
  
• Nelson Santovenia
  Nelson Santovenia
  Nelson Gil Santovenia Mayol , is a former professional baseball player who played in the Major Leagues primarily as a catcher from 1987 to 1993. He played college baseball at the University of Miami....
  
  
• Tim Wallach
  Tim Wallach
  Timothy Charles Wallach , nicknamed "Eli" in reference to actor Eli Wallach, is a former third baseman in Major League Baseball who played from to for the Montreal Expos, Los Angeles Dodgers, and California Angels. He won three Gold Glove awards for defensive excellence and 2 Silver Slugger...
  
  

Notable transactions

• May 25, 1989: Randy Johnson
  Randy Johnson
  Randall David Johnson , nicknamed "The Big Unit", is a former Major League Baseball left-handed pitcher. During a 22-year career, he pitched for six different teams....
  
  , Brian Holman
  Brian Holman
  Brian Scott Holman is a former Major League Baseball pitcher. He is now the Managing Director and Principal for Ronald Blue & Co.'s branch office in Kansas City, Kansas....
  
  , and Gene Harris
  Gene Harris (baseball)
  Tyrone Eugene "Gene" Harris is a former Major League Baseball player who pitched in the major leagues from -....
  
   were traded by the Expos to the Seattle Mariners
  Seattle Mariners
  The Seattle Mariners are a professional baseball team based in Seattle, Washington. Enfranchised in , the Mariners are a member of the Western Division of Major League Baseball's American League. Safeco Field has been the Mariners' home ballpark since July...
  
   for Mark Langston
  Mark Langston
  Mark Edward Langston is an American former Major League Baseball left-handed pitcher. He pitched for the Seattle Mariners , Montreal Expos , California and Anaheim Angels , San Diego Padres , and Cleveland Indians...
  
   and a player to be named later. The Mariners completed the deal by sending Mike Campbell to the Expos on July 31.
• July 2, 1989: Sergio Valdez
  Sergio Valdéz
  Sergio Valdez is a former pitcher in Major League Baseball who played from through for the Montreal Expos , the Atlanta Braves , the Cleveland Indians the Boston Red Sox , and the San Francisco Giants .-Career:On September 10, , Valdez made his major league debut against the New...
  
  , Nate Minchey
  Nate Minchey
  Nathan Derek Minchey is a former pitcher in Major League Baseball who played from 1993 through 1997 for the Boston Red Sox and Colorado Rockies...
  
  , and Kevin Dean (minors) were traded by the Expos to the Atlanta Braves
  Atlanta Braves
  The Atlanta Braves are a professional baseball club based in Atlanta, Georgia. The Braves are a member of the Eastern Division of Major League Baseball's National League. The Braves have played in Turner Field since 1997....
  
   for Zane Smith
  Zane Smith
  Zane William Smith is a former American Major League baseball player.-Career:Smith, a left-handed pitcher, played collegiately at Indiana State University. He was drafted by the Atlanta Braves in the 3rd round of the 1982 amateur draft and made his Major League debut on September 10, 1984 for...
  
  .
• July 27, 1989: Rick Carriger (minors) was traded by the Expos to the Cleveland Indians
  Cleveland Indians
  The Cleveland Indians are a professional baseball team based in Cleveland, Ohio. They are in the Central Division of Major League Baseball's American League. Since , they have played in Progressive Field. The team's spring training facility is in Goodyear, Arizona...
  
   for Doug Piatt
  Doug Piatt
  Douglas William Piatt is a former Major League Baseball pitcher. He appeared in 21 games for the Montreal Expos in , all in relief. Despite putting up an impressive 2.60 earned run average and striking out 29 batters in 34 2/3 innings, Piatt never received another chance in the major leagues...
  
  .
• August 29, 1989: Mike Blowers
  Mike Blowers
  Michael Roy Blowers is a former Major League Baseball third baseman and first baseman. He is an alumnus of Bethel High School in Spanaway, Washington, Tacoma Community College and the University of Washington...
  
   was traded by the Expos 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 John Candelaria
  John Candelaria
  John Robert Candelaria . He attended The Caton School P.S. 249. Nicknamed "The Candy Man," is a former professional left-handed pitcher who played for the Pittsburgh Pirates, California Angels, New York Mets, New York Yankees, Montreal Expos, Minnesota Twins, Toronto Blue Jays, and Los Angeles...
  
  .

Draft Picks

• June 5, 1989: 1989 Major League Baseball Draft
  1989 Major League Baseball Draft
  -First round selections:The following are the first round picks in the 1989 Major League Baseball draft.-Supplemental first round selections:-External links:*...
  
  
  • Charles Johnson was drafted by the Expos in the 1st round (10th pick), but did not sign.
  • Doug Bochtler
    Doug Bochtler
    Douglas Eugene Bochtler is a former pitcher in Major League Baseball from -.-External links:...
    
     was drafted by the Expos in the 9th round. Player signed June 26, 1989.

Major League debuts

• Batters:
  • Marquis Grissom (Aug 22)
  • Marty Pevey (May 16)
  • Larry Walker (Aug 16)
• Pitchers:
  • Steve Frey (May 10)
  • Mark Gardner (May 16)
  • Gene Harris (Apr 5)

Roster

Player stats

Starters by position

Other batters

Starting pitchers

Other pitchers

Relief pitchers

Award winners

• Mark Langston, National League Pitcher of the Month
  Pitcher of the Month
  The Pitcher of the Month award is a Major League Baseball award named by each league for each month of the regular season. The National League started recognizing the award in . The American League followed in...
  
  , July

Farm system