Cooper, now 67, spent 42 days with the Braves in 1980, falling one day short of the minimum.
Both camps came to an agreement to go forward with the fight but without a title on the line.
Meulens is seen in a since-deleted video sitting in one of the pilots' seats during a team charter from Denver to Toronto.
The Mets are one of eight teams debuting City Connect uniforms this season.