The following are the baseball events of the year 1902 throughout the world.
Major League Baseball
1902 World Series: Not played due to AL-NL war over player contracts.
Major league baseball final standings
National League final standings
- June 2 – The Cleveland Bronchos commit 6 errors in one inning against the Baltimore Orioles. It will be the most errors by a team in one inning for the entire 20th century.
- June 3 – Mike O'Neill of the St. Louis Cardinals connects for the first ever pinch-hit grand slam home run.
- June 15 – Future major leaguer Nig Clarke goes 8-8, all home runs, as his Corsicana team blasts Texarkana 51-3 in a Texas League game. Corsicana collects 53 hits, including 21 homers, in playing the game in a park where right field is only 210' from home plate.
- June 30 – The Cleveland Bronchos becomes the first American League team to hit three consecutive home runs in one inning, as Nap Lajoie, Charlie Hickman and Bill Bradley connect in the sixth off St. Louis Browns pitcher Jack Harper, with all the homers landing in the left field bleachers at St. Louis. The last two come on the first pitch thrown, while Cleveland wins the game 17–2. The feat was last done in the National League on May 10, 1894.
- August 13 – Harry Davis of the Philadelphia Athletics steals second base with teammate Dave Fultz on third in an attempt to score Fultz. When he draws no throw, Davis then steals back to first base on the next pitch. He then steals second again, this time drawing the throw, scoring Fultz.
- August 14 – Tommy Leach of the Pittsburgh Pirates hit only 13 home runs over the fence in a career of over 2100 games. On this day, however, he does it twice against the Boston Beaneaters. Leach will go on to win the National League home run crown in 1902 with 6.
- August 18 – Hal O'Hagan, of the Rochester Broncos, turns professional baseball's first unassisted triple play against Jersey City in a minor league game.
- August 19 – Kip Selbach of the Baltimore Orioles ties a record by committing 5 errors from the outfield in one game.
- October 2 – The Boston Beaneaters defeat the New York Giants 2-1 in 14 innings. The game produces 8 runners thrown out attempting to steal, 3 pick-offs, 3 double-plays and 2 runners thrown out at the plate.
- February 1 – Bill Sharsig, 47, Co-owner, general manager, business manager and on-field manager of the American Association Philadelphia Athletics.
- February 4 – Tom Hernon, 35, outfielder for the 1897 Chicago Colts.
- February 16 – Tom O'Meara, 29, catcher and first baseman of the Cleveland Spiders from 1895 to 1896.
- March 19 – Tom Burns, 44, infielder for the Chicago White Stockings/Colts (1890–1890) and Pittsburgh Pirates, who also managed Pittsburgh (1892) and the Chicago Orphans (1898–1899).
- March 22 – Johnny Ryan, 48, baseball pioneer who played in the early years of the National League for the Philadelphia White Stockings (1873), Baltimore Canaries (1874), New Haven Elm Citys (1875), Louisville Grays (1876) and Cincinnati Reds (1877).
- March 27 – Tom Morrison, 32, infielder/outfielder who played from 1895 through 1896 for the Louisville Colonels.
- March 7 – Pud Galvin, 45, pitcher who amassed record 361 victories, including two no-hitters, primarily with Buffalo and Pittsburgh; career marks in games (697), innings (5941) and shutouts (57) were all records as well.
- April 4 – Charlie Sweeney, 38, pitcher the Providence Grays who left to play for the Union Association champs, the St. Louis Maroons. Between the two teams, he had a 41-15 win-loss record. By leaving the Grays, he left them without another starting pitcher, which allowed Charles Radbourn to win 59 games.
- April 5 – Dave Eggler, 52, center fielder for 11 seasons, including five in the short-lived National Association, who batted .272 in 576 career games.
- April 18 – George Grossart, 21, left fielder for the 1901 Boston Beaneaters.
- May 2 – Bill Greenwood, 45, second baseman for five teams from 1882 to 1890.
- June 12 – Tim Donahue, 32, catcher who played from 1891 to 1902 with the Boston Reds, Chicago Colts/Orphans and Washington Senators, hitting .236 in 466 games in part of eight seasons.
- June 23 – John Firth, 47, pitcher who played briefly for the 1884 Richmond Virginians of the American Association.
- July 15 – Pat Whitaker, 36, pitcher for the early Baltimore Orioles in 1888 and 1889.
- July 27 – Packy Dillon, catcher for the 1875 St. Louis Red Stockings.
- August 30 – Rome Chambers, 26, pitcher for the 1900 Boston Beaneaters.
- September 23 – George Prentiss, 26, pitcher for the 1901 Boston Americans and 1902 Baltimore Orioles.
- November 5 – Daisy Davis, 43, pitcher who posted a 16-21 record in 40 games for the 1884 St. Louis Browns and the 1885 Boston Beaneaters.
- November 18 – Watch Burnham, 42, National League umpire between 1883 and 1885, who called balls and strikes for a no-hitter hurled by Charles Radbourn of the Providence Grays in 1883, and later managed the 1887 Indianapolis Hoosiers.
- December 1 – Fred Dunlap, 43, second baseman who played from 1880 to 1891 for six different teams and managed three of them, who led the National League in doubles in 1880 and the Union Association in batting average, home runs, hits and runs scored during the 1884 season, while leading the St. Louis Maroons to the championship title.
- December 4 – Mike Mansell, 44, left fielder who hit .239 in 371 games for six teams from 1879 to 1884, who led the American Association in doubles and triples during the 1884 season.
- December 11 – Bill Hawke, 32, pitcher who posted a 32-31 record with the St. Louis Browns and Baltimore Orioles National Leagues teams from 1892 to 1894, including a no-hitter against the Washington Senators in 1893.
- December 16 – Frank Buttery, 51, utility who hit a .215 average in 18 games and posted a 3-2 record as a pitcher for the 1872 Middletown Mansfields of the National Association.