May 14 – In their first Sunday home game, the Cleveland Naps defeat the New York Highlanders, 16-3, before a crowd of nearly 16,000 spectactors. Cleveland's George Stovall leads the offense with 4 hits.
June 18 – The Detroit Tigers staged the biggest comeback in Major League history after overcoming a 13-1 deficit (after 5½ innings) to defeat the Chicago White Sox by a score of 16–15.
July 19 – former circus acrobat Walter Carlisle completed an unassisted triple play for the Vernon Tigers of the Pacific Coast League. With the score tied at 3–3 in the sixth inning, and men on first and second base, Carlisle made a spectacular diving catch of a short fly by batter Roy Akin; stepped on second to retire Charlie Moore, and tagged George Metzger coming from first. The Tigers won the game, 5–4. With his heroic feat, the speedy English-born Carlisle entered the records books as the only outfielder ever to make an unassisted triple play in organized baseball.
June 28 – The new Polo Grounds, a horseshoe-shaped structure, opens.
July 24 – An American League all-star team – including Walter Johnson, Hal Chase, and Smokey Joe Wood – plays the Cleveland Naps to raise money for the widow of Addie Joss. The All-Stars win, 5-3.
September 12 – In the nightcap of a game billed as a pitchers' duel, Boston Rustlers' Cy Young and the New York Giants' Christy Mathewson face each other before 10,000 fans, Boston's largest crowd of the year. Young gives up three home runs and nine runs in less than three innings. After the Giants build a 9–0 lead, Giants' manager John McGraw lifts Mathewson, who pitched just two innings, preferring to save his ace for the pennant race against the Chicago Cubs and the Philadelphia Phillies. This is the only time the two future Hall of Fame pitchers ever face each other.
October 26 – The Philadelphia Athletics defeat the New York Giants, 13–2, in Game 6 of the World Series to win their second consecutive World Championship title. Philadelphia wins the series, four games to two. The six consecutive days of rain between Games 3 and 4 caused the longest delay between World Series games until the Loma Prieta earthquake interrupted the 1989 Series, which incidentally featured the same two franchises, albeit on the west coast.
December 1 – Future Hall of Fame member Walter Alston is born in Venice, Ohio. Although Alston will come to bat only once during a brief major league career, he will have far greater longevity as the manager of the Dodgers from 1954 to 1976.
April 5 – Frank Hankinson, 54, third baseman and pitcher who played from 1878 through 1888 with the White Stockings, Blues, Trojans, Gothams. Metropolitan and Cowboys.
April 14 – Addie Joss, 31, pitcher for Cleveland who won 20 games four times (1905–08), led American League in ERA twice with a career 1.89 ERA, including one-hitter in major league debut, one no-hitter and a perfect game.
April 23 – George Craig, 23, pitcher for the 1907 Philadelphia Athletics.
April 25 – Jack Rowe, 54, catcher and shortstop for Buffalo and Detroit who batted .300 four times, led NL in triples in 1881; did not strike out in entire 1882 season, later a minor league manager
May 26 – Billy O'Brien, 51, third baseman for four teams in two different leagues from 1884 to 1890, who topped the Nationel League batters with 19 home runs in 1887.
June 3 – Dad Clarke, 46, who pitched from 1888 to 1898 for the White Stockings/Solons/Giants/Colonels, going 44-51 with a 4.17 ERA.
June 23 – John O'Rourke, 59, center fielder who hit .295 in 290 games with the Boston Red Caps (1879–1880) and New York Metropolitans (1883), leading the National League with a .521 slugging in 1879.
July 4 – Jimmy Mathison, 32, third baseman for the 1902 Baltimore Orioles.
July 26 – John Radcliff, 65, shortstop for five seasons in the National Association.
August 5 – Bob Caruthers, 47, pitcher who compiled the highest career winning percentage among major leaguers with 250 decisions; led American Association with 40 victories in both 1885 and 1889, pacing St. Louis and Brooklyn to respective pennants; batted .300 twice, later an umpire
August 8 – Joe Walsh, 46, infielder for the 1881 Baltimore Orioles of the American Association.
August 31 – Will White, 56, pitcher who won over 200 games for Cincinnati teams in 10-year career, led league in wins and strikeouts twice each; first major leaguer to wear eyeglasses, and batterymate of brother Deacon from 1877–79