Student or Learner
In modern parlance, we have cheapened the significance of
the word "miracle." We speak of "miracle drugs," "miracle
diets," "Miracle on Ice," or even the "miracle Mets." But of
course, that's not the original intended meaning of the word.
More accurately, a miracle is an event that appears inexplicable
by the laws of nature and so is held to be supernatural in origin.
1969 New York Mets season - Wikipedia, the free encyclopedia
It's the other baseball team from New York City. In only their 8th season they won the World Series. In all of their previous seasons they lost more games than they won and never were close to winning any championship.
Oh, and "Mets" is a shortened version of "Metropolitans."
No, it refers to the baseball team called "the Mets" who had a miracle season and won the championship.