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 American League victory in 2004 All-Star Game.
American/National League is seeded 1-3/2-4 as a result of A/NL regular season champion (New York Yankees)/(St. Louis Cardinals) and A/NL wild card (Boston Red Sox)(Houston Astros) coming from the same division.
Barry Bonds of the Giants has another outstanding year. He sets the all-time record for highest on-base percentage at .609, breaking his previous record of .582, set in 2002. He also posts a slugging average of .812, the fourth-highest ever, and also breaks his previous OPS record of 1.381, set in 2002, with a 2004 OPS of 1.422. Bonds also set a record for most walks in a season, with 232. Finally, with 120 intentional walks, he almost doubles his previous record of 68.
January 6 – Dennis Eckersley and Paul Molitor are elected to the National Baseball Hall of Fame by the BBWAA in their first year of eligibility. Eckersley, who spent a 24-year career with the Cleveland Indians, Boston Red Sox, Chicago Cubs, Oakland Athletics and St. Louis Cardinals, is one of only a few pitchers to excel as both a starter and a closer, becoming the only pitcher in Major League history to collect 100 complete games and 100 saves, while posting ten or more wins 10 times, including a 20-win season, a no-hitter in 1977, and winning the American League MVP and Cy Young Awards in 1992. A versatile player, able to cover positions across infield and outfield, Molitor is only the third player with at least 3,000 hits 600 doubles and 500 stolen bases, being the others Ty Cobb and Honus Wagner. Besides, Molitor collected seven consecutive hits with the Milwaukee Brewers in the 1982 World Series, including the first five-hit game ever in a Series. At the age of 37, after signing with the Toronto Blue Jays, Molitor collected 111 RBI, becoming the oldest player in Major League history to post his first 100-RBI season. Then when Toronto defeated the Philadelphia Phillies in six games in the 1993 World Series, he was named MVP after hitting a .500 average (12-for-24) with two home runs and eighth RBI, while tying a Series record with 10 runs scored.
March 4 – Commissioner Bud Selig announces that Major League Baseball will celebrate Jackie Robinson Day in every ballpark on April 15, commemorating and honoring the anniversary of the debut of Jackie Robinson, who became the first black major league baseball player of the modern era in the 1947 season. Previously, Robinson's uniform number "42" was retired for all time in a ceremony at Shea Stadium in April 1997 to mark the 50th anniversary of his achievement. His debut with the Brooklyn Dodgers ended approximately 80 years of baseball segregation, also known as the baseball color line.
April 14 – At Yankee Stadium, Kevin Brown of the New York Yankees wins his 200th career game, the Yankees defeating the Tampa Bay Devil Rays 5-1. Brown's victory follows teammate Mike Mussina's 200th career victory in the team's most recent game three days earlier, the Yankees having defeated the Chicago White Sox 5-4. The Yankees become the first team to have two pitchers record their 200th career victories in the same season, and their duo reaches their milestones in consecutive games.
April 18 – At Wrigley Field, Sammy Sosa sets the record for most home runs in a Chicago Cub uniform. In the first inning of the Cubs' 11-10, 10-inning loss to the Cincinnati Reds, Sosa, who entered the game tied with Ernie Banks with 512 home runs as a Cub, homers off Paul Wilson; he will hit another home run off Wilson in the third inning. At the end of the season, Sosa will be traded to the Baltimore Orioles, after hitting 545 home runs as a Cub.
May 28 – Matt Clement becomes the 21st big league pitcher and the first Chicago Cubs pitcher in over a century to hit three batters in one inning, to tie a major league record. The victims plunked in the fifth inning of the first game of a doubleheader against Pittsburgh are Bobby Hill, Jason Kendall and Craig Wilson.
June 26 – With a 6-4 victory over the Florida Marlins, the Tampa Bay Devil Rays have a record of 36-35, becoming the first team in Major League history to have a winning record after being 18 games under .500. At one point in the season, they are 10-28, then go on a 26-7 run. Before falling under .500 for good in July, the Rays win or tie 13 out of 14 series, including three straight sweeps during a club-record 12-game winning streak.
July 6 – Detroit Tigers pitcher Jason Johnson becomes the first player in Major League Baseball history to get permission to wear an insulin pump on the field. A diabetic, Johnson wears the pump on his belt on the left side of his lower back, in order to minimize the chance of it being hit by a bat or thrown ball.
July 10 – Barry Bonds breaks his own record for intentional walks received in a season; amazingly, he breaks the former full-season record of 68, set in 2002, before the All-Star break. After three intentional walks in a 3-1 San Francisco Giants win over the Arizona Diamondbacks, his total stands at 71; he finishes with 120.
July 16 – With his solo home run in the eighth inning of the Philadelphia Phillies' 5-1 victory over the New York Mets, Bobby Abreu joins Willie Mays, Bobby Bonds and Barry Bonds by reaching the elite 20-homers/20-steal plateau for a sixth straight season. This quartet is the only group of players to have six straight 20-20 seasons in major league history. Abreu also becomes the only member of the quartet with no family connection to Barry, his late father Bobby, or his godfather Willie.
August 3 – The St. Louis Cardinals' Albert Pujols, at age 24, becomes the first player ever to hit at least 30 home runs in each of his first four seasons. In 1936, Joe DiMaggio belted 29 home runs in his rookie season with the New York Yankees, and 30 or more in the following five seasons. Mark McGwire hit three homers in his 1986 first year with the Oakland Athletics, and 30 or more in the next four seasons. Pujols also becomes the first Cardinal in the franchise's 112-year history to hit 30 or more home runs in four consecutive years.
August 10 – At Great American Ball Park, Adam Dunn of the Cincinnati Reds hits the first home run ever to land in another state. Against José Lima of the Los Angeles Dodgers, Dunn hits a ball that exits the ballpark in center field and bounces onto Mehring Way, which runs between GABP and the Ohio River. The ball then bounces onto a piece of driftwood in the river, which is considered Kentucky territory. Despite Dunn's blast, which is measured at 535 feet (to date, the longest in the stadium's history), the Dodgers defeat the Reds 4-2.
August 11 – Randy Wolf homers twice and throws seven solid innings to lead the Philadelphia Phillies to a 15-4 victory over Colorado. Wolf, who has four career homers, goes 3-for-3 and scored three runs.
August 26 – At Safeco Field, the Seattle Mariners' Ichiro Suzuki belts a leadoff home run in the ninth inning for his 200th hit in 2004, reaching the mark in fewer games than any player since 1930. In that season, Bill Terry of the New York Giants reached 200 in the Giants' 119th game, while Chuck Klein of the Philadelphia Phillies collected No. 200 in game No. 125. With the hit, which snaps an 0-for-11 slide, Ichiro becomes the first player in major league history to record at least 200 hits in each of his first four seasons. He hit 242 in 2001, 208 in 2002, and 212 in 2003.
September 9 – Joe Randa becomes the first player in AL history to have six hits and six runs in the same nine-inning game in the Kansas City Royals' 26-5 victory over the Detroit Tigers in the first game of a doubleheader.
September 23 – The NPB player dispute officially ends when the owners make an agreement with players to allow a new team to join the Pacific League and fill the void caused by the merger of the Buffaloes and Blue Wave in the 2005 season to form the Orix Buffaloes. The Tohoku Rakuten Golden Eagles later become the team to fill the place.
September 29 – Major League Baseball announces that the Montreal Expos move to the Washington, D.C. area for the 2005 season. That night, the Expos play their final home game in front of 30,000+ fans. The Expos lose to the Florida Marlins 9-1.
October 1 – Ichiro Suzuki surpasses George Sisler's 84-year-old record of 257 hits in a single season. After this game, Ichiro collects 259 hits in the season with two games left; he finishes the season with 262 hits.
October 2 – The Anaheim Angels clinch their first AL West Division title in 18 years with a 5-4 victory over the Oakland Athletics. The Angels also earn their first playoff berth since 2002, when they win the World Series as the wild card. The Angels, who trail Oakland by one game four days before, are tied for first place when the three-game series starts, and many expect the race to come down to the last day of the season; but Anaheim ends the suspense with two consecutive victories.
The Houston Astros clinch a berth in the playoffs with their 18th consecutive home victory by beating the Colorado Rockies 5-3 to win the NL wild card. Houston wins the final seven games of the regular season and nine of the last 10 to complete an amazing late-season push for the playoffs under manager Phil Garner, who replaces Jimy Williams at the All-Star break. The Astros are a season-worst 56-60 on August 14. Since then, the team compiles a major league-best 36-10.
The Montreal Expos conclude their 36-year history by losing to the New York Mets 8-1 at Shea Stadium, the franchise's final game before its move to Washington, D.C. Endy Chávez is the final player to bat for the Expos, grounding out for the game's final out. Ironically, the Expos had also played their very first game at Shea Stadium, defeating the Mets 11-10 on April 8, 1969.
October 9 – At Minnesota, the New York Yankees rally for four runs to tie the game in the eighth, then push across the winning run in the 11th on a wild pitch. The 6-5 win against the Minnesota Twins gives them a 3-1 AL Division Series victory and sends them back to Yankee Stadium, where they open against the Boston Red Sox in the best-of-seven ALCS.
October 11 – The Houston Astros post a 12-3 triumph over the Atlanta Braves in the decisive fifth game of the NLDS. Winning a postseason series for the first time in the 43-year history of the franchise, the Astros earn a spot in the best-of-seven NLCS against the St. Louis Cardinals.
October 24 – The Red Sox win 6-2 at Fenway Park behind Curt Schilling, to take the Series lead 2-0. Schilling goes 6 innings, giving up only 1 run (not earned) and only 4 hits, while striking out 4.
October 26 – Takashi Ishii goes six strong innings and Alex Cabrera hits a towering two-run homer as the Seibu Lions defeat the Chunichi Dragons 7-2 in Game 7 of the Japan Series to win their first championship since 1992. The ball bounces off the glass-enclosed private boxes above the left field seats. It is Cabrera's third home run of the Series. The former Arizona Diamondbacks player also has a grand slam and a two-run homer in Game 3. For his part, Ishii is selected the Series Most Valuable Player.
November 22 – The recently relocated Washington, D.C. National League franchise announces its new name, logo and colors. Using the official original name of the district's team which uses the nickname the Senators from 1901 to 1972, the club clad in red, white, blue and gold is known as the Nationals.
November 26 – Vladimir Guerrero, who hit .337 with 39 home runs and 126 RBI, earned the American League MVP Award, while receiving 21 of the 28 first-place votes. The former Montreal Expos outfielder had signed as a free agent with the Anaheim Angels after the New York Mets refused to guarantee his salary based on advice from their medical staff.
January 2 – Paul Hopkins, 99, oldest living major leaguer at the time of his death, who is best known as the pitcher who gave up Babe Ruth's record-tying 59th home run in 1927.
January 3 – Leon Wagner, 69, three-time All-Star left fielder in a 12-year career with five teams, who had two seasons of 30 home runs and 100 RBI, and was named MVP of the 1962 MLB All–Star Game.
January 5 – Tug McGraw, 59, All-Star relief pitcher for the Mets and Phillies who held the National League's career saves record for left-handers (180) until 1990, and was on the mound when the Phillies won their first World Series title in 1980.
January 15 – Gus Suhr, 98, Pittsburgh Pirates All-Star who set a National League record with 822 consecutive games played by a first baseman from 1931–1937, then he had a three-day absence so he could attend his mother's funeral, as the record stood for thirty years, when it was broken by St. Louis Cardinals' Stan Musial in 1957.
January 17 – Harry Brecheen, 89, All-Star pitcher for the St. Louis Cardinals, who was 3-0 with a 0.45 ERA in the 1946 World Series, clinching the title with a Game 7 relief win.
January 20 – Marie Wegman, 78, All-Star infielder/outfielder in the All-American Girls Professional Baseball League.
January 21 – Johnny Blatnik, 82, outfielder who played from 1948 to 1950 for the Philadelphia Phillies and St. Louis Cardinals.
March 18 – Gene Bearden, 83, pitcher who employed the knuckleball in a remarkable 1948 rookie season for the Indians, winning 20 games, leading the AL in ERA and earning a save in the final World Series game.
March 27 – Bob Cremins, 98, pitcher who made four relief appearances for the 1927 Boston Red Sox.
June 3 – Joe Cleary, 85, pitcher, the last native of Ireland to play in a major league game.
June 4 – Wilmer Fields, 81, pitcher/outfielder who was a household name in the Negro Leagues and other baseball circuits between the 1940s and 1950s, winning seven MVP Awards throughout the course of his distinguished career.
June 8 – Mack Jones, 65, outfielder for three NL teams who had the first major league home run hit in Canada.
June 16 – George Hausmann, 88, second baseman for the New York Giants from 1944 to 1945, who was suspended for jumping to the outlaw Mexican League.
September 3 - Frenchy Uhalt, 94, outfielder for Chicago White Sox in 1934.
September 7 – Bob Boyd, 84, first baseman who was the first black player to sign with the White Sox, and the first 20th-century Oriole to hit over .300.
September 7 – Hal Reniff, 66, relief pitcher for the Yankees who saved 18 games in 1963.
September 9 – Rose Gacioch, 89, an outstanding outfielder and pitcher in the heyday of the All-American Girls Professional Baseball League.
September 15 – Nalda Bird, 77, All-American Girls Professional Baseball League pitcher, who hurled complete game shutouts in both games of a doubleheader (1945), to join Ed Reulbach (National League, 1908) and Bill Foster (Negro Leagues, 1926) as the only pitchers ever to have achieved the feat in baseball history.
October 3 – John Cerutti, 44, pitcher and broadcaster for the Blue Jays who won 11 games for the 1989 division champions.
October 10 – Ken Caminiti, 41, All-Star third baseman who won the NL's 1996 MVP award and three Gold Gloves; made news in 2002 with admission of steroid use and allegations of their prevalence in major leagues.
October 13 – Mike Blyzka, 75, pitcher for the St. Louis Browns and Baltimore Orioles from 1953 to 1954, and one of 17 players involved in the largest transaction in major league history.
October 17 – Ray Boone, 81, All-Star infielder and patriarch of three-generation major league family which included son Bob and grandsons Bret and Aaron.
October 20 – Chuck Hiller, 70, second baseman for four NL teams who was that league's first player to hit a grand slam in the World Series.
October 21 – Jim Bucher, 93, infielder/outfielder for the Brooklyn Dodgers, St. Louis Cardinals and Boston Red Sox between 1934 and 1945.
October 24 – Bethany Goldsmith, 77, All-American Girls Professional Baseball League pitcher.
October 26 – Bobby Ávila, 80, Mexican All-Star second baseman for the Indians who won the AL batting title in 1954, the first Hispanic player to do so; became president of the Mexican League.
December 10 – Ed Sudol, 84, National League umpire from 1957 to 1977 who worked three World Series and was behind the plate for Jim Bunning's perfect game (1964) and three Mets games of 23 or more innings.
December 13 – Andre Rodgers, 70, shortstop for the Giants, Cubs and Pirates who was the first Bahamian major leaguer; former cricket player learned baseball at a Giants tryout.
December 14 – Danny Doyle, 87, scout for the Red Sox since 1949 who signed Roger Clemens; briefly a catcher for the 1943 team.
December 14 – Rod Kanehl, 70, second baseman and outfielder for the Mets who hit the team's first ever grand slam.
December 15 – Larry Ponza, 86, pitching machine innovator.
December 16 – Ted Abernathy, 71, relief pitcher who led the NL in saves in 1965 and 1967.
December 16 – Bobby Mattick, 89, longtime scout who managed the 1980–81 Blue Jays; previously a shortstop for the Cubs and Reds.
December 22 – Doug Ault, 54, first baseman for the Blue Jays who hit two home runs in the franchise's first game in 1977.
December 23 – Wilmer Harris, 80, pitcher for the Negro Leagues' Philadelphia Stars.
December 24 – Johnny Oates, 58, manager who led the Rangers to their only three playoff appearances in 1996, '98 and '99; also managed Orioles, and was catcher with five teams.
December 26 – Eddie Layton, 79, organist for the New York Yankees from 1967 to 2003.
December 29 – Ken Burkhart, 89, National League umpire from 1957 to 1973 who worked in three World Series; a pitcher who won 18 games for the 1945 Cardinals, he was the last surviving umpire who played in the majors.
December 29 – Gus Niarhos, 84, catcher for four teams, most notably the Yankees; later a minor league manager.
December 31 – Joe Durso, 80, sportswriter for The New York Times since 1950, and author of several baseball books.