July 15
From The Met Wiki
1963: Carl Willey becomes the first Mets pitcher ever to hit a grand slam in a 14-5 win over Houston. The victory snaps a 15-game losing streak for the team.
1969: Al Weis hits a three-run homer to highlight a 5-4 Mets win over the Cubs at Chicago.
1971: The Mets end a six-game losing streak with a 9-4 win over the Astros at Houston.
1982: Dave Kingman and Mookie Wilson hit two-run homers in a 5-2 Mets win over the Dodgers at Los Angeles.
1991: The Mets trade Ron Darling to the Expos for Tim Burke.
