April 13

From The Met Wiki

1962: In their first home game ever, the Mets lose to the Pirates, 4-3, at the Polo Grounds.

1967: Tom Seaver makes his first major league start. Seaver strikes out 8 batters in five and one-third innings and gets a no-decision in the Mets' 3-2 win over the Pirates at Shea Stadium.

1980: Pete Falcone and Neil Allen combine for a five-hit shutout as the Mets defeat the Cubs, 5-0, at Shea Stadium.

1982: The Mets defeat the Phillies, 5-2, in their first home game of the season.

1990: The Mets defeat the Expos, 4-1, in 10 innings at Montreal. Julio Machado gets his first major league win.

1993: In their first game ever in Colorado, the Mets defeat the Rockies, 8-4, at Denver's Mile High Stadium.

2008: David Wright hits his 100th career homer in the Mets' 9-7 loss to the Milwaukee Brewers.

2009: The Mets lose to the Padres, 6-5, in the first regular season game at Citi Field. Brian Stokes in the losing pitcher for the Mets. David Wright hits the Mets' first homer at the new ballpark.