1948 Tommy Henrich of the Yankees hits his fourth grand slam of the season to tie the American League mark. Henrich, who broke in with the New York club in 1937, had never hit a grand slam before this season.
Harmon Killebrew of the Minnesota Twins hit his 500th home run in the first inning off Baltimore’s Mike Cuellar to become the 10th player to hit 500 or more in a career. The “Killer” would total 573 dingers in his Hall of Fame career.
1998 Dennis Martinez of the Braves records his 244th career victory, surpassing Juan Marichal as the winningest Latin American pitcher. Ironically, Martinez’s 7-5 win comes against the Giants, Marichal’s former team.
1997 Brad Radke of Minnesota got his 12th straight win, pitching seven strong innings in the Twins’ 9-3 victory over the Toronto Blue Jays. Radke became only the third pitcher since 1950 to win 12 consecutive starts.