The teams will play a single-admission doubleheader Wednesday starting at 4:10 p.m.
DeGrom, with a major league-leading 1.68 ERA and an 8-8 record after 28 starts, had been set to start Sunday at Citi Field against Philadelphia. But the Mets scratched the NL Cy Young Award contender because of rainy weather before a 6-4 win over the Phillies, and instead had ready to pitch Monday. He's now scheduled to start Tuesday night against the Marlins and on Sunday at Fenway Park against the Boston Red Sox.
DeGrom has made 25 consecutive starts overall allowing three runs or fewer, tying the major league record set by King Cole of the 1910 Chicago Cubs.
The Marlins were rained out for the second straight day. They were postponed Sunday at Pittsburgh.
This game was called four hours before it was supposed to begin. It had been raining all day in the New York area and more wet weather was forecast into the middle of the week.
This was the 50th weather-related postponement in the majors this season. There were 39 for all of last year.