September 26: Jim Palmer becomes the fourth Oriole picture of the 1971 season to record 20 victories (1971).
September 27: Cleveland 2B Nap Lajoie gets his 3,000th hit (1914); Lou Gehrig hits his first major league home run (1923) and his final major league home run (1938); Eddie Mathews becomes the first rookie to hit three home runs in one game (1952); the St. Louis Browns play their last game (they would become the Baltimore Orioles the next season) (1953); Tim Raines becomes the first player since Ty Cobb to steal 70 bases and drive in 70 runs in one season (1983); Felipe Alou wins his 600th game as a manager (1999).
September 28: A grand jury indicts eight members of the Chicago White Sox on charges of fixing the 1919 World Series (1920); Ted Williams becomes the last player to hit .400 for one season (1941); Willie Mays hits his 51st home run of the season in his 2,000th career game (1965); the Baltimore Orioles become only the third team in MLB history to win 100 games in three straight season (1971); Phil Niekro makes his final MLB appearance (1987).
September 29: The first reserve system was implemented to prevent players from signing two or more contracts (1879); Walter Johnson gets his 36th win of the season (1913); Willie Mays makes his famous over-the-shoulder catch in game 1 of the World Series (1954); the final game is played at the Polo Grounds (1957); Stan Musial plays in his final game (1963); Ron Hunt sets a major league records by getting hit by a pitch for the 50th time in one season (1971); Don Mattingly sets a major league record when he hits his 6th grand slam of the season (1987); the final game is played at County Stadium in Milwaukee (2000).
September 30: The World Series is televised for the first time (1947); at age 16, Jim Derrington of the White Sox becomes the youngest pitcher to start an MLB game (1956); the Washington Senators play their final game, which is forfeited to New York when fans stream onto the field with two outs in the 9th inning (1971); Roberto Clemente gets his 3,000th and final hit (1972); Rickey Henderson steals his 97th base of the season, setting an American League record (he finishes the season with 100 stolen bases) (1980); the final game is played at old Comiskey Park (1990); George Brett gets his 3,000th hit (1992); Albert Belle becomes the first player to hit 50 home runs and 50 doubles in one season (1995); the Yankees become the first team to hit three straight home runs in a postseason game when Tim Raines, Derek Jeter, and Paul O’Neil hit consecutive home runs (1997); the final game is played at 3Com park (formerly known as Candlestick Park) (1999).
October 1: The first World Series game ever is played, with the Pittsburgh Pirates defeating the Boston Red Sox 7-3 (1903); the final game at Philadelphia’s Connie Mack Stadium is played – after the Phillies win, the fans swarm on the field, destroying it (1970).
October 2: The only triple header of the 20th century is played by the Cincinnati Reds and the Pittsburgh Pirates (with the Reds winning the first two games) (1920); Bob Feller sets a single-game record of when he strikes out 18 Detroit Tigers in one game (1938) (Steve Carlton would break the record in 1969); Bob Gibson sets a World Series Record when he strikes out 17 Detroit Tigers in game one of the World Series (1968); the Seattle Pilots play their last game before a crowd of 5,473 (1969); Hank Aaron hits his 733rd career home run (1974).