February 19 - Commissioner Bowie Kuhn announces the suspension of Detroit Tigers pitcher Denny McLain, effective April 1, for McLain's alleged involvement in a bookmaking operation. The suspension is indefinite, but will later be set at three months.
April 1 - The Milwaukee Brewers organization, headed by Bud Selig, purchases the Seattle Pilots franchise for $10,800,000. Although negotiations were conducted over a period of months, it was not until March 13 when a federal bankruptcy referee declared the Pilots bankrupt. Brewers tickets go on sale the next day. Team equipment is shipped to Milwaukee County Stadium, where the Pilots insignia is ripped off of the uniforms, since there is no time for new uniforms to be made.
April 7 - Major league baseball returns to Wisconsin after a 4-year absence as the Brewers play their first game in Milwaukee, losing to the California Angels 12–0 before a crowd of 37,237.
April 7 - Pitcher Dave McNally struck out 13 in nine innings as the Baltimore Orioles ripped the Indians, 8-2, in Opening Day at Cleveland Stadium. The attack was led by Paul Blair, who drove in a pair of runs and scored three times. McNally held the Indians to two runs on four hits and three walks to get the win. Rookie Roy Foster belted a two-run home run for the only offense for Cleveland.
April 22 - The New York Mets' Tom Seaver strikes out 19 San Diego Padres, including the last 10 in succession, in winning 2-1 for the Mets. Mike Corkins takes the loss. In this century, no one had ever struck out 10 in a row, a major league record. Counting the 10 whiffs, the Pads have struck out 29 times in two games, a National League record that will be topped in 1998 when the Houston Astros miss 31 times in two days. Jerry Grote adds one foul fly catch to his 19 putouts via K's.
May 10 - Hoyt Wilhelm makes his 1,000th pitching appearance; the first pitcher in history to do so.
July 16 - Pittsburgh's Three Rivers Stadium was opened to the public, but the Cincinnati Reds spoiled the party as they beat the Pittsburgh Pirates 4-3 before a crowd of 48,846. The first hit at Three Rivers Stadium was a single by Pittsburgh's Richie Hebner. The first home run at Three Rivers Stadium was hit by Cincinnati's Tony Pérez.
July 26 - Johnny Bench of the Cincinnati Reds hit three straight homers off Steve Carlton of the St. Louis Cardinals. On the same day, Orlando Cepeda of the Atlanta Braves connected for three consecutive homers in an 8-3 victory over the Chicago Cubs.
October 1 - Vic Davalillo of the St. Louis Cardinals against the Pittsburgh Pirates breaks the National League single-season pinch hitting record and ties the Major League record with his 24th pinch hit of the year. Also, the Phillies defeated the Montreal Expos 2-1 in 10 innings in the final game at Shibe Park (Connie Mack Stadium). The occasion was marred by people literally dismantling the stadium while the game was still in progress. A special post-game ceremony — including a helicopter delivery to Veterans Stadium of home plate — was cancelled.
November 25 - New York Yankees catcher Thurman Munson receives 23 of 24 first-place votes and is named American League Rookie of the Year. Munson batted .302 with six home runs and 53 RBI during the regular season. Cleveland Indians outfielder Roy Foster (.268, 23, 60) is also named on a first place ballot.
November 27 - Pitcher Carl Morton, who posted an 18-11 record with 154 strikeouts and a 3.60 ERA for the last-place Montréal Expos, receives the National League Rookie of the Year Award. Morton beats out Cincinnati Reds outfielder Bernie Carbo, who hit .310 with 21 home runs and 63 RBI.
March 18 - Frosty Thomas, 88, pitcher for the 1905 Detroit Tigers, who also collected 85 wins with the Minneapolis Millers (WL) from 1902–07.
March 20 - Jack Flater, 86, pitcher for the 1908 Philadelphia Athletics.
April 8 - Lee Handley, 57, an infielder for the Pittsburgh Pirates during eight seasons, who also played with the Cincinnati Reds and Philadelphia Phillies.
April 11 - Joe Heving, 69, a pitcher for the Giants, White Sox, Indians, Red Sox and Braves between 1930 and 1945, who led American League pitchers with 63 appearances in 1944, despite being the only grandfather playing in the majors.
April 11 - Sailor Stroud, 84, pitcher who posted a 5-7 record with a 3.25 ERA and three shutouts for the Detroit Tigers (1915) and New York Giants (1916).
April 12 - Red Shannon, 73, backup infielder who played from 1917 to 1921 with the Braves, Athletics, Red Sox, Senators and Cubs.
April 14 - John Donaldson, 78, star pitcher in the Negro Leagues, mainly with the All Nations team and Kansas City Monarchs.
April 15 - Ripper Collins, 66, All-Star first baseman who led NL in homers in 1934, then batted .367 in World Series.
April 16 - Mal Eason, 91, pitcher for the Chicago Orphans, Boston Beaneaters, Detroit Tigers and Brooklyn Superbas in the early 20th century.
April 17 - Dick Brown, 35, part-time catcher who hit 62 home runs with 223 RBI in 636 games for the Indians, White Sox, Tigers and Orioles.
April 18 - Tony York, 57, infielder for the 1944 Chicago Cubs, and one of many major leaguers who only played during World War II.
April 26 - Yats Wuestling, 66, backup shortstop who played from 1929 to 1930 for the Tigers and Yankees.
May 13 - Urbane Pickering, 70, backup infielder who hit .257 with 11 home runs and 92 RBI for the 1921-22 Red Sox.
May 16 - Dutch Ruether, 76, pitcher who won opener of 1919 World Series for Cincinnati, later a scout for the Giants.
May 19 - Ray Schalk, 77, Hall of Fame catcher for the Chicago White Sox who was noted for his defensive brilliance, setting records for career games, putouts and double plays at the position.
May 24 - Bill Lamar, 73, outfielder for the New York Yankees, Boston Red Sox, Brooklyn Robins and Philadelphia Athletics (1917–1927), who collected a .310 average including a .356 in 1925.
May 31 - Zip Zabel, 79, Chicago Cubs reliever who set a major league record for the most innings pitched in relief (181⁄3) during the 1915 season.
June 1 - George Watkins, 69, outfielder for the St. Louis Cardinals, New York Giants, Philadelphia Phillies and Brooklyn Dodgers in the early 1930s, who owns the major league season-record for a rookie with a .373 batting average (1930).
June 3 - Jakie May, 74, relief pitcher from 1917–32, who posted a 72-95 record with a 3.88 ERA in 410 appearances for the Cardinals, Reds and Cubs.
June 14 - Webbo Clarke, 42, Panamanian pitcher who played for the 1955 Washington Senators.
June 23 - Ross Reynolds, 82, pitcher who posted a 5-4 record with a 2.62 ERA for the 1914-15 Detroit Tigers.
July 7 - Harry Wolter, 85, outfielder/pitcher from 1907-17 for the Reds, Pirates, Cardinals, Red Sox, Highlanders, Yankees and Cubs.
July 16 - Peahead Walker, 71, who had a distinguished minor league career as player and manager, and later became a prolific football coach with several collegiate squads as well as the CFL's Montreal Alouettes.
July 25 - Herb Hunter, 74, utility IF/OF for the New York Giants, Chicago Cubs, Boston Red Sox and St. Louis Cardinals between 1916 and 1921.
July 29 - Charley Moore, 85, infielder for the 1912 Chicago Cubs.
August 11 - Paul Gillespie, 49, fine defensive catcher for the Cubs in the early 1940s, who hit home runs both in his first and last major league at-bats.
August 15 - Ray Bates, 80, third baseman for the Cleveland Naps (1913) and Philadelphia Athletics (1917).
August 26 - Eddie Rommel, 72, pitcher who won 171 games for the Philadelphia Athletics, and later worked 22 years as an American League umpire.
August 31 - Heinie Odom, 69, third baseman for the 1925 New York Yankees.
November 5 - Dave Robertson, 89, outfielder from 1912-22 for the New York Giants, Chicago Cubs and Pittsburgh Pirates, who led twice the National League in home runs (1916–17).
November 5 - Charlie Root, 71, pitcher who won a club-record 201 games for the Chicago Cubs, surrendered Babe Ruth's supposed "called shot" in 1932 World Series.
November 24 - Ivy Andrews, 63, pitcher for three American League teams from 1931–38 and a member of the New York Yankees 1932 World Champions, who later became the first pitching coach for Double-A Birmingham Barons.
December 10 - Johnny Mostil, 74, center fielder for the Chicago White Sox whose promising career was derailed by a 1927 suicide attempt.
December 12 - Doug Taitt, 68, right fielder for the Red Sox, White Sox and Phillies from 1938 to 1932, who later became a successfully hitter and manager in the minor leagues.
December 13 - Chick Gandil, 83, first baseman and the reported ringleader among the eight players who threw the 1919 World Series.
December 16 - Jim Winford, 61, pitcher from 1932-38 for the St. Louis Cardinals and Brooklyn Dodgers.