1870 — Monmouth Park in New Jersey opened with a five-day race meet.
1917 — Ty Cobb, Bobby Veach and Ossie Vitt each went 5-for-5 in Detroit's 16-4 win over Washington.
1933 — Dizzy Dean struck out 17 Cubs, and the St. Louis Cardinals beat Chicago 8-2.
1947 — The New York Giants beat Ewell Blackwell and the Cincinnati Reds 5-4 in 10 innings, ending Blackwell's 16-game winning streak.
1959 — Willie McCovey had four hits in four at-bats in his major league debut, with the San Francisco Giants. His hits included two triples in a 7-2 win over the Philadelphia Phillies.
1968 — Washington shortstop Ron Hansen pulled off an unassisted triple play, but the Cleveland Indians still won the game 10-1.
1973 — Jim Bibby of the Texas Rangers pitched a 6-0 no-hitter against the Oakland A's.
1980 — Houston Astros pitcher J.R. Richard had a stroke during a workout at the Astrodome and underwent surgery to remove a blood clot behind his right collarbone.
1982 — The Atlanta Braves returned Chief Noc-A-Homa and his teepee to left field after losing 19 of 21 games and blowing a 10½-game lead. The teepee was removed for more seats. The team recovered to regain first place.
1990 — George Steinbrenner was forced to resign as general partner of the New York Yankees by baseball commissioner Fay Vincent.
2003 — Chicago White Sox shortstop Jose Valentin hit three home runs by the fifth inning in a 15-4 win over Kansas City. It was the second three-homer game of his career, and the third time he has homered from both sides of the plate.
2005 — Jonny Gomes had the first three-homer game in Tampa Bay franchise history in a 7-3 victory over Kansas City.
2006 — New York Mets center fielder Carlos Beltran tied a major league record with his third grand slam this month in a 9-6 victory over Atlanta. Beltran became the ninth player in major league history to hit three grand slams in a calendar month.
2008 — Kelly Shoppach of Cleveland tied a major league record with five extra-base hits, including a game-tying homer in the ninth, but Detroit beat the Indians 14-12 in 13 innings. Shoppach had two homers and three doubles.
2010 — Carlos Gonzalez, Ian Stewart and Dexter Fowler homered and Colorado used a record-setting 12-run eighth inning to a 17-2 rout of the Chicago Cubs. Gonzalez had four hits, two in the eighth when the Rockies set a major league record with 11 straight hits in the inning. The Rockies had 13 hits in the inning, a franchise record. The Rockies batted around twice in the inning against relievers Sean Marshall, Andrew Cashman and Brian Schlitter.
2011 — The New York Yankees broke loose for 12 runs in the first inning of the nightcap of a day-night doubleheader, setting a franchise record en route to a 17-3 rout of Baltimore.
2012 — Kendrys Morales homered from both sides of the plate during a nine-run sixth inning, capping the burst with a grand slam that sent the Los Angeles Angels romping past the Texas Rangers 15-8. Morales became the third switch-hitter in major league history to homer as a lefty and righty in the same inning. Carlos Baerga did it for Cleveland in 1993 and Mark Bellhorn of the Chicago Cubs duplicated the feat in 2002.