The following are the baseball events of the year 1998 throughout the world.
Major League Baseball
- World Series: New York Yankees over San Diego Padres (4-0); Scott Brosius, MVP
- American League Championship Series: New York Yankees over Cleveland Indians (4-2); David Wells, MVP
- National League Championship Series: San Diego Padres over Atlanta Braves (4-2); Sterling Hitchcock, MVP
- All-Star Game, July 7 at Coors Field: American League, 13-8; Roberto Alomar, MVP
- Caribbean World Series: Águilas Cibaeñas (Dominican Republic)
- College World Series: USC
- Japan Series: Yokohama BayStars over Seibu Lions (4-2)
- Little League World Series: Toms River, New Jersey
Awards and honors
- Most Valuable Player
- Cy Young Award
- Rookie of the Year
- Manager of the Year Award
Major League Baseball final standings
|1st||New York Yankees||114||48||.704||--|
|2nd||Boston Red Sox *||92||70||.568||22.0|
|3rd||Toronto Blue Jays||88||74||.543||26.0|
|5th||Tampa Bay Devil Rays||63||99||.389||51.0|
|2nd||Chicago White Sox||80||82||.494||9.0|
|3rd||Kansas City Royals||72||89||.447||16.5|
|2nd||New York Mets||88||74||.543||18.0|
|2nd||Chicago Cubs *||90||73||.552||12.5|
|3rd||St. Louis Cardinals||83||79||.512||19.0|
|1st||San Diego Padres||98||64||.605||--|
|2nd||San Francisco Giants||89||74||.546||9.5|
|3rd||Los Angeles Dodgers||83||79||.512||15.0|
- The asterisk denotes the club that won the wild card for its respective league. The Chicago Cubs defeated the San Francisco Giants in a 1-game playoff to determine the NL wild card.
- January 5 - Don Sutton, a 324-game winner, is elected to the Baseball Hall of Fame on his fifth try. Sutton, who missed election by nine votes in 1990, is named on 81.6% of the ballots.
- February 2 - New York Yankees general manager Bob Watson announces his resignation. He is replaced by 30–year–old Brian Cashman.
- March 3 - Larry Doby, Lee MacPhail, George Davis and Bullet Joe Rogan are elected to the Hall of Fame by the Veterans Committee.
- March 31 - The Tampa Bay Devil Rays lose to the Detroit Tigers 11–6, in their first game ever. Pitcher Wilson Alvarez takes the loss for Tampa while third baseman Wade Boggs hit the first home run in team history and drives in three runs.
- March 31 - The Arizona Diamondbacks drop a 9–2 decision to the Colorado Rockies in their first game ever. Andy Benes is tagged with the loss, and rookies Travis Lee, who gets three hits, and Karim García hit home runs. Vinny Castilla drives in five runs for Colorado.
- April 1 - The expansion Tampa Bay Devil Rays win their first game in franchise history, beating the Tigers 11–8. Fred McGriff has four RBI on three hits.
- April 2 - By hitting a home run in Colorado's 6–4 win over Arizona at Bank One Ballpark, Rockies outfielder Ellis Burks sets a major league record by having homered in 33 different stadiums.
- April 5 - The Arizona Diamondbacks win their first game in franchise history 3–2, over the San Francisco Giants. Andy Benes gets the win for the 1–5 D'backs.
- April 10 - The Los Angeles Dodgers' Mike Piazza becomes the fifth NL player in history to hit grand slams in consecutive games by homering in a 7–2 win over the Houston Astros. Piazza also homered with the bags full, while driving in six runs, in last night's 7–2 win over Arizona. He'll hit another on April 24 to tie the major-league record for slams in a month.
- April 13 - The Seattle Mariners' Ken Griffey, Jr. slugs two home runs in a 6–5 loss to the Cleveland Indians. In doing so, he becomes the second–youngest player in big league history to reach 300 homers for his career, at 28 years and 143 days. Jimmie Foxx, at 27 years 328 days, was younger.
- May 3 - The Seattle Mariners' Dan Wilson becomes just the seventh catcher in major league history to hit an inside-the-park grand slam, as Seattle defeats Detroit 10–6. It's a first for the Mariners and the first in the AL since Mike Greenwell did it on September 1, 1990.
- May 6 - In one of the finest pitching efforts ever, Chicago Cubs rookie righthander Kerry Wood fans 20 Houston Astros in a 2–0, one-hit victory to tie the major league mark for strikeouts in a 9-inning game. The 20-year-old ties the record held by Roger Clemens, who performed the feat twice. Wood does not walk a batter in his masterpiece, allowing only an infield single to Ricky Gutiérrez in the 3rd inning, that likely would have been ruled an error had it occurred late in the game. He hit one batter with a pitch, for only two Astros baserunners allowed. Wood also becomes the second pitcher in baseball history whose strikeout total matches his age (Bob Feller struck out 17 at the same age). Wood strikes out the first five batters of the game, and seven in a row between the 7th and 9th innings, a streak that ties Jamie Moyer's Cubs record. He'll strike out 13 Diamondbacks in just seven innings of a 4–2 win over Arizona in May 11. By doing so, Wood sets a major league record with 33 strikeouts over two consecutive games.
- May 13 - The Atlanta Braves set an NL record by homering in their 25th straight game, a 10–2 win over the St. Louis Cardinals. This ties the major league mark held by the 1941 Yankees and the 1994 Tigers. The streak will be stopped by the Cardinals tomorrow.
- May 15 - In one of the biggest trades in recent years, the Dodgers send All-Star catcher Mike Piazza and third baseman Todd Zeile to the Florida Marlins in exchange for outfielders Gary Sheffield and Jim Eisenreich, catcher Charles Johnson, third baseman Bobby Bonilla, and pitcher Manuel Barrios. On May 22, the Mets will acquire Piazza from the Marlins in exchange for outfielder Preston Wilson, pitcher Ed Yarnall and a minor league player.
- May 17 - Yankees pitcher David Wells hurls the 13th perfect game in modern major league history with a 4–0 win over the Minnesota Twins. Wells fans 11 batters in his masterpiece. Bernie Williams strokes three hits for New York, including a home run.
- May 18 - The Oakland Athletics' Mike Blowers hits for the cycle and drives home four runs in the A's 14–0 win over the White Sox. Blowers become only the 2nd player in franchise history to accomplish the feat.
- May 19 - The Cardinals' Mark McGwire hits three home runs in a game for the 2nd time this season, leading St. Louis to a 10–8 victory over the Philadelphia Phillies. He is only the 12th player in history to have a pair of 3–HR games in the same season. McGwire drives in six of the Cardinal runs as he reaches the 20 home run mark faster than other player in history.
- May 20 - The Triple-A Indianapolis Indians perform a feat possibly never before duplicated in professional baseball. In the 5th inning of a game against the Pawtucket Red Sox, Indianapolis players hit for a "Homer Cycle". Pete Rose, Jr. opens the inning with a solo home run, Jason Williams connects for a 3–run shot, Glenn Murray slugs a grand slam, and Guillermo Garcia finishes the scoring with a 2–run blast. The Indians win the game 11–4.
- May 25 - Cleveland's David Bell becomes the third player in major league history to play against a team managed by his father. Bell's 2–run double brings home the go–ahead run in the Indians 7–4 win over Buddy Bell's Detroit Tigers. Bump Wills and Moisés Alou are the only other players to appear in games against their fathers (Maury Wills and Felipe Alou).
- May 28 - With Arizona leading the Giants, 8–6, in the bottom of the 9th with the bases loaded, manager Buck Showalter orders reliever Gregg Olson to intentionally walk Barry Bonds to bring home the Giants' 7th run. It is only the 4th bases–loaded intentional walk in major league history, and the first since Bill "Swish" Nicholson on July 23, 1944.
- June 6 - Hall of Fame second baseman Joe Morgan has his uniform number 8 retired by the Cincinnati Reds in a ceremony at Cinergy Field.
- June 7 - At Camden Yards, Hall of Famer Eddie Murray has his uniform number 33 retired by the Baltimore Orioles.
- June 10 - Colorado's Dante Bichette becomes the first Rockies player ever to hit for the cycle in the team's 9–8, 10–inning victory over the Rangers.
- June 10 - NY Yankee Tim Raines steals the 800th base of his career in NY's 6–2 win over the Montréal Expos. He is the fifth player in history to reach the milestone.
- June 20 - The Cleveland Indians retire Bob Lemon's uniform number 19 prior to the team's 5–3 loss to the Yankees.
- July 7 - The American League defeats the National League 13–8, in the 69th All–Star Game. Baltimore's Roberto Alomar is named the game's MVP, going 3–for–4 with a home run, one RBI, one stolen base and two runs scored.
- August 9 - Dennis Martínez of the Atlanta Braves defeats the San Francisco Giants 7–5, for his 244th career victory, to set the record for most wins by a Latin American pitcher. Juan Marichal held the old mark. Chipper Jones backs Martínez' pitching with four hits and four RBI.
- August 13 - Harold Baines of the Baltimore Orioles becomes the all–time leader in RBI by a designated hitter when he drives in his 824th in a 7–4 win over the Indians. Hal McRae was the previous record–holder.
- August 14 - Baltimore catcher Chris Hoiles becomes the ninth player — and first catcher — to hit two grand slams in a single game, doing so in a 15–3 win over the Cleveland Indians.
- August 25 - The Toronto Blue Jays' Roger Clemens strikes out 18 in a 3–0 victory over the Kansas City Royals. He becomes the first pitcher ever to record three games of 18 or more strikeouts. Clemens allows only three hits and does not walk a batter.
- August 31 - Oakland's Rickey Henderson scores the 2,000th run of his career in the Athletics' 15–6 loss to Cleveland. He joins Ty Cobb, Hank Aaron, Babe Ruth, Pete Rose and Willie Mays as the only players to reach the milestone.
- September 4 - The New York Yankees win their 100th game of the season, defeating the Chicago White Sox 11–6, besting the 1906 Chicago Cubs and 1954 Cleveland Indians by five days.
- September 5 - Mark McGwire becomes the third player in major league history to reach 60 home runs, as the St. Louis Cardinals beat the Cincinnati Reds 7-0. McGwire joins Babe Ruth and Roger Maris with 60 home runs in a single season.
- September 6 - Atlanta's Andruw Jones hits his 50th career home run in a 4–0 win over the New York Mets. He becomes the 3rd–youngest player in history to reach that level; only Mel Ott and Tony Conigliaro did so at a younger age.
- September 8 - Mark McGwire breaks Roger Maris' 37-year-old home run record, lining historic No. 62 just over the wall in left field with two outs in the fourth inning. McGwire's shot off the Chicago Cubs' Steve Trachsel sets off a wild celebration at Busch Stadium.
- September 11 - The Florida Marlins lose to the Atlanta Braves 8–2, to become the first World Series champion in history to lose 100 games the next season.
- September 15 - Ken Griffey, Jr. hits homer #52 and drives in the 1,000th run of his career in the Mariners 12–7 win over the Twins. He becomes the 4th–youngest player in history to reach the milestone, after Mel Ott, Jimmie Foxx and Lou Gehrig. A day later, Griffey will collect his 20th stolen base of the season to become just the third player in major league history to record at least 50 homers and 20 steals in the same season; Willie Mays and Brady Anderson are the others.
- September 17 - Denny Neagle puts the Atlanta Braves pitching staff into the baseball record books as he limits the Arizona Diamondbacks to four hits in six innings for a 1-0 win. Neagle improves to 15-11, making the Braves the first major league team with five 15-game winners since the 1930 Washington Senators. Neagle joins Tom Glavine, Greg Maddux, John Smoltz and Kevin Millwood.
- September 20 - Cal Ripken, Jr. of the Baltimore Orioles takes himself out of the lineup prior to the game with the New York Yankees to end his major league record consecutive game streak at 2,632. The Orioles lose the historic game by a score of 5–4. Ryan Minor, Ripken's replacement at 3B, gets one hit in four at bats.
- September 21 - Jason Kendall of the Pittsburgh Pirates steals his 26th base of the season to set a new NL record for catchers. The previous mark was set by John Stearns in 1978.
- September 24 - Boston Red Sox pitcher Tom Gordon records his 42nd consecutive save of the year for a new major league mark as Boston defeats the Baltimore Orioles 9–6. Rod Beck and Trevor Hoffman shared the old mark.
- September 26 - Dennis Eckersley gets a standing ovation from the Fenway Park crowd as he appears in his 1,071st game, breaking Hoyt Wilhelm's record for most appearances by a pitcher.
- September 27 - The Cincinnati Reds double up on the Pittsburgh Pirates, beating them 4–1. Cincinnati uses a brother infield of Bret Boone (2B), his brother Aaron (3B), Barry Larkin (SS) and his brother Stephen (1B).
- Mark McGwire and Sammy Sosa each chase the home run single-season record set previously by Roger Maris in 1961. Both players end up breaking the record; McGwire with 70 and Sosa with 66.
- World Series: New York Yankees win 4 games to 0 over the San Diego Padres. The Series MVP is Scott Brosius, Yankees third baseman.
- November 9 - It is revealed that Hall of Fame pitcher Jim "Catfish" Hunter is suffering from amyotrophic lateral sclerosis, the progressive, ultimately fatal neurological condition better known as Lou Gehrig's disease.
- November 23 - The Atlanta Braves sign free agent outfielder Brian Jordan to a 5-year contract.
- November 30 - The Arizona Diamondbacks sign free agent Randy Johnson to a 4-year contract.
- December 12 - The Dodgers set the salary bar higher by signing free agent Kevin Brown to a 7-year, $105 million contract, the largest in the majors.
- February 11 - Mike Fornieles, 66, All-Star relief pitcher for four AL teams who led league in saves in 1960
- February 18 - Harry Caray, 83, beloved and much-parodied broadcaster for the Cardinals, White Sox and Cubs since 1945
- April 26 - Gabe Paul, 88, general manager of the Cincinnati Reds, Houston Colts .45s, and Cleveland Indians from 1951 to 1973, later part owner of the Yankees
- May 9 - Ray Noble, 79, Cuban catcher in the Negro Leagues, later a reserve with the New York Giants
- May 16 - Rufino Linares, 47, Dominican left fielder for the Atlanta Braves who hit .298 for 1982 division champions
- June 4 - Shirley Povich, 92, sportswriter for The Washington Post since 1924
- June 10 - Jim Hearn, 77, All-Star pitcher for the Cardinals and NY Giants who won 17 games for New York's 1951 pennant winners
- June 21 - Al Campanis, 81, general manager of the Dodgers from 1968 to 1987 who was fired after making racially controversial remarks in a 1987 TV interview; previously a scout for 18 years
- July 19 - Elmer Valo, 77, Czech right fielder who batted .300 five times for the Philadelphia and Kansas City Athletics; later a minor league manager and scout
- July 27 - Bill Tuttle, 69, center fielder for three AL teams who batted .300 for the 1959 Kansas City Athletics
- August 6 - Jack Brickhouse, 82, broadcaster for the Cubs from 1941–1981, also with the White Sox for over 20 years
- August 17 - Johnny Lipon, 75, shortstop for the Tigers who scored 104 runs in 1950; later a minor league manager
- August 17 - Jim Murray, 79, sportswriter for the Los Angeles Times since 1961 who won a Pulitzer Prize and was named the nation's best sportswriter 14 times
- September 17 - Chet Hoff, 107, pitcher for the New York Highlanders and St. Louis Browns who became the longest-lived major league player
- September 30 - Dan Quisenberry, 45, All-Star relief pitcher for the Kansas City Royals who led the AL in saves a record five times and posted the first 40-save season in history; held AL career record from 1987 to 1992 and was Cy Young runnerup twice
- October 2 - Gene Autry, 91, owner of the Angels since their formation in 1961 who hoped in vain for the team's first pennant, watching the team fall achingly short three times
- October 6 - Mark Belanger, 54, All-Star shortstop and eight-time Gold Glove winner for the Baltimore Orioles, later a players' union official
- October 14 - Denny Galehouse, 86, pitcher who won 109 games with the Indians, Red Sox and Browns, and Game 1 of 1944 World Series
- November 10 - Hal Newhouser, 77, Hall of Fame pitcher for the Detroit Tigers who won back-to-back MVP awards in 1944-45; led AL in wins four times and in ERA and strikeouts twice each; struck out 10 in Game 7 victory in 1945 World Series
- November 16 - Russ Meyer, 75, pitcher who won over 90 games for the Cubs, Phillies and Dodgers, known as the "Mad Monk" for his fiery temper
- November 20 - Dick Sisler, 78, All-Star first baseman and left fielder for three NL teams whose closing day home run brought the Phillies the 1950 pennant
- November 23 - Bob Betts, 70, public announcer at Milwaukee County Stadium for 23 seasons