The Detroit Tigers had one of the worst records in baseball history, going 43-119, a .265 winning percentage.
The Chicago Cubs just missed advancing to their first World Series since 1945, as they blew a 3-1 series lead against the Marlins in the 2003 NLCS.
The Oakland Athletics blew a 2-0 series lead against the Boston Red Sox in the 2003 ALDS, making it four straight years they lost the ALDS in 5 games, including an 0-9 mark in games in which they could have clinched the series.
The Yankees beat the Red Sox in a thrilling ALCS, highlighted by Aaron Boone's walk-off home run in the 11th inning in Game 7 off of Tim Wakefield.
Click on any series score to link to that series' page.
Higher seed has home field advantage during Division Series and League Championship Series.
American League has home field advantage during World Series as a result of the American League victory in the 2003 All-Star Game.
American League is seeded 1-3/2-4 as a result of AL regular season champion (New York Yankees) and AL wild card (Boston Red Sox) coming from the same division.
National League is seeded 1-3/2-4 as a result of NL regular season champion (Atlanta Braves) and NL wild card (Florida Marlins) coming from the same division.
May 25 – The Toronto Blue Jays completed their first four-game sweep ever against the New York Yankees, winning 5–3 at Yankee Stadium and sending New York to its seventh consecutive home loss. The Yankees also dropped their season-high fourth in a row overall, a skid that has dropped them out of the American League East lead, while their slump at Yankee Stadium is their worst since they lost 10 straight in the 1986 season. Now New York has lost 11 of the last 12 at home.
The Boston Red Sox score a record-setting 10 runs in the first inning against the Florida Marlins before recording an out. Two Marlins pitchers, starter Carl Pavano and reliever Michael Tejera, pitch to a combined 11 batters and would not record an out. The Red Sox score 14 runs in the first inning which ties the American League record. Johnny Damon ties the modern-day record for hits in an inning with three.
July 29 – Against the Texas Rangers at The Ballpark in Arlington, Bill Mueller of the Boston Red Sox, in hitting three home runs, becomes the first player to hit a grand slam from each side of the plate in the same game. After hitting a solo home run off starter R.A. Dickey in the third, Mueller homers in the seventh with the bases loaded against left-hander Aaron Fultz. One inning later he hits his second grand slam, this time against right-hander Jay Powell. With the three home runs, Mueller drives in nine runs; the Red Sox defeat the Rangers 14-7.
September 20 – Unlike this season when the Montreal Expos play 25% of their home games in San Juan, Puerto Rico, the players vote to play their entire 2004 home schedule in Montreal. MLB owners, who collectively own the franchise, are still considering moving the Expos permanently to Washington, D.C., Portland, Oregon or Monterrey, Mexico, or continuing the present format by having the team split home games between different locations (Puerto Rico or Mexico and Montreal).
October 14 – In Game 6 of the NLCS, with the Chicago Cubs just five outs away from eliminating the Florida Marlins, Cubs fan Steve Bartman deflects a foul fly ball away from Cubs left fielder Moisés Alou, allowing Florida's Luis Castillo to continue batting. The Cubs then proceed to fall apart, allowing eight runs in the inning to lose Game 6; they go on to lose Game 7, to continue the "Curse of the Billy Goat". The Marlins go on to win the World Series, and Bartman becomes a pariah in Chicago.
November 22 – 46–year old relief pitcher Jesse Orosco agrees to a minor league contract with the Arizona Diamondbacks and earns an $800,000 salary if he is added to the big league roster. He retires before the start of the 2004 season.
February 10 – Chuck Aleno, 85, third baseman for the Cincinnati Reds from 1941–44 who set the Major League record for the longest hitting streak to start a career with 17.
February 12 – Haywood Sullivan, 72, general manager of the Red Sox from 1977–84, previously a catcher and manager with the Kansas City Athletics.
February 17 – Steve Bechler, 23, pitching prospect who made three relief appearances for the 2002 Orioles.
February 27 – Edythe Perlick, 80, three-time AAGPBL All-Star outfielder.
February 28 – Jim Fridley, 78, outfielder for the Cleveland Indians, Baltimore Orioles and Cincinnati Redlegs between 1952 and 1958, and one of 17 players involved in the largest transaction in major league history.
March 14 – Al Gionfriddo, 81, outfielder who in his last major league game, Game 6 of the 1947 World Series, robbed Joe DiMaggio of a home run to preserve the Brooklyn Dodgers' 8-6 victory over the Yankees. However, the Yankees went on to win the series the next day.
March 19 – Joe Buzas, 84, reserve shortstop for the 1945 Yankees who later operated 82 minor league franchises in his 47 years as an owner.
March 28 – Sam Bowens, 64, an outfielder who played for the Baltimore Orioles and Washington Senators from 1963 through 1969.
April 19 – Chris Zachary, 59, pitcher for five teams who posted a 1.41 ERA in relief for the 1972 Tigers.
May 6 – Art Houtteman, 75, All-Star pitcher who won 19 games for the 1950 Tigers and 15 for the 1954 Indians.
May 8 – Dorothy Ferguson, 80, Canadian infielder/outfielder in the All-American Girls Professional Baseball League from 1945 to 1954.
May 8 – Sam Lacy, 99, sportswriter for several decades in Washington, Chicago and Baltimore who championed the sport's integration and was one of the BBWAA's first black members.
June 1 – Johnny Hopp, 86, All-Star outfielder and first baseman who batted .300 five times with the Cardinals, Braves and Pirates.
June 18 – Larry Doby, 79, Hall of Fame center fielder for the Cleveland Indians, previously an All-Star second baseman in the Negro Leagues, who became AL's first black player in 1947; led AL in home runs twice, had five 100-RBI seasons; also a coach and scout.
June 22 – Leonard Koppett, 79, sportswriter and author who worked both in New York and on the West Coast.
July 19 – Dorothy Stolze, 80, one of the most versatile utility players in All-American Girls Professional Baseball League history.
July 27 – Bob Hope, 100, comedian and movie star who was part-owner of the Cleveland Indians in the 1950s; performed his signature song "Thanks for the Memory" in 1993 as the Indians ended 60 years of games at Municipal Stadium.
August 7 – Mickey McDermott, 74, pitcher who won 18 games for the 1953 Red Sox, but whose colorful personal life overshadowed his play.
August 9 – Billy Rogell, 98, shortstop for the Tigers' first World Series champions in 1935.
August 21 – Ken Coleman, 78, voice of the Boston Red Sox for 20 years, also with the Indians and Reds.
August 23 – Bobby Bonds, 57, All-Star right fielder for eight teams who recorded five of the first ten instances of hitting 30 home runs and stealing 30 bases in a season, ending career with 332 HRs and 461 steals; father of Barry Bonds.
August 30 – Claude Passeau, 94, 5-time All-Star pitcher for the Phillies and Cubs who led NL in strikeouts in 1939; pitched a one-hitter in Game 3 of the 1945 World Series.
September 14 – Allen Lewis, 86, sportswriter for the Philadelphia Inquirer for thirty years who also served twelve years as chairman of baseball's scoring rules committee.
September 18 – Pauline Crawley, 79, outfielder who played in the All-American Girls Professional Baseball League.
September 25 – George Plimpton, 76, author whose forays into sports included pitching against the NL team prior to the second 1960 All-Star Game; wrote a fictitious story for Sports Illustrated in 1985 on "Sidd Finch", a phenomenal pitching prospect.
November 5 – Dernell Stenson, 25, promising young outfielder who had played 37 games in 2003 with the Cincinnati Reds.
November 6 – Spider Jorgensen, 84, third baseman who debuted with the Brooklyn Dodgers on the same day that teammate Jackie Robinson broke baseball's color barrier.
November 15 – Earl Battey, 68, All-Star catcher and three-time Gold Glove winner for the White Sox, Senators and Twins who batted .302 in 1961.
November 18 – Ken Brett, 55, All-Star pitcher for numerous teams who at age 19 became the youngest pitcher to appear in the World Series; brother of Hall of Famer George Brett.
November 22 – Joe Just, 87, Cincinnati Reds player in 1944 and 1945.
November 24 – Warren Spahn, 82, Hall of Fame pitcher for the Boston and Milwaukee Braves whose 363 victories made him the fifth-winningest pitcher (and the winningest left-hander) in history; thirteen 20-win seasons included Cy Young Award campaign in 1957 championship season; 14-time All-Star pitched two no-hitters, and led NL in wins eight times, in strikeouts, shutouts and innings four times each, and in ERA three times; 2583 strikeouts were record for left-handers until 1975, and 5244 innings remained top mark among southpaws.
November 30 – Jack Brewer, 85, pitcher who played from 1944–46 for the New York Giants.
December 1 – Barbara Galdonik, 69, All-American Girls Professional Baseball League player.
December 26 – Paul Owens, 79, general manager of the Phillies from 1972 to 1984 who also managed the team to the 1983 pennant.
December 27 – Ivan Calderón, 41, Puerto Rican All-Star outfielder for four teams who had three multi-HR games with the 1987 White Sox and batted .300 for the 1991 Expos, was murdered in a bar in Loiza, Puerto Rico.