Ramsey] According to Wayne Randazzo, the Mets are no longer using their blue road jersey. Per an MLB rule, they can only have 4 and replaced it with the black jersey
Mets Morning News: Back to black? - Amazin' Avenue
All 8 teams prep for Division Series openers Saturday
The New York Mets are reviving their black uniforms for the second half of the season, are once again owners of the best jersey in baseball, This is the Loop
NY Mets are back in black: A brief history of the club's uniforms
Sewald, cut by Mets, wins for Mariners in return to Citi Field – Trentonian
Logos and uniforms of the New York Mets - Wikipedia
Mets eager to get home after another loss and 2-4 road trip - Newsday
Darryl Strawberry opens up on rookie season that launched Mets revival