March 3 – Ray Dandridge, a third baseman from the Negro Leagues, is the only player elected to the Hall of Fame by the Special Veterans Committee.
April 6 – Los Angeles DodgersGeneral managerAl Campanis, a former teammate of Jackie Robinson, appears on the ABC news program, Nightline to discuss the progress of racial integration of baseball on the fortieth anniversary of Robinson's first game. When asked why more African-Americans have not become managers or executives, Campanis states that Blacks may lack certain qualities for those jobs, drawing the ire of host Ted Koppel. Campanis was fired two days later.
September 18 – Darrell Evans hits his 30th home run of the season, and becomes the first player to do so after the age of 40.
September 21 – Darryl Strawberry swipes his 30th base of the season to join the 30–30 club. With teammate Howard Johnson already having joined, it marks the first time that two teammates achieve 30–30 seasons in the same year.
October 4 – The Detroit Tigers defeat the Toronto Blue Jays 1–0 to clinch the American League East division title. The victory caps off a thrilling pennant race in which the Tigers overcame a 3.5 game deficit to the Blue Jays in the last two weeks of the season, including sweeping the Blue Jays at Tiger Stadium in the final weekend, and finishing two games ahead of Toronto in the standings.
October 25 – In Game Seven of the World Series, starter Frank Viola and reliever Jeff Reardon hold the St. Louis Cardinals to six hits, as the Minnesota Twins win 4–2 for their second World Championship, and their first since moving to Minnesota and changing their name to the Twins. The franchise's first title came in 1924 as the Washington Senators. Viola is named the Series MVP.