Some quick math, 1962-present
Mets: 26 complete-game 1-hitters
All other teams: 467 complete-game 1-hitters
Mets: 8,020 total games
All other teams: 201,898
So all other teams have produced 467 1-hitters in 201,898 games, or a rate of 0.23% of the time.
The Mets have produced 26 1-hitters in 8,020 games, or a rate of 0.32% of the time.
It may not sound like a lot, but it means that the Mets should have had 18 or 19 1-hitters in their existence instead of the 26 they’ve actually had. What does this tell us? What we already knew–they had been overdue for a no-hitter.