We've found the answer, the blue alternate jersey : r/NewYorkMets

3 NY Mets players who will take a step forward next year, 2 who won't

New York Mets Youth Home Jersey

After reading many people complain about the Patch on the jerseys this season it was hard not to notice the patch during games my Graphic Design mind took over and thought these

Authentic Youth Pete Alonso Royal Blue Alternate Road Jersey - #20 Baseball New York Mets Cool Base

New York Mets Blue MLB Jerseys for sale

New York Mets Blue MLB Jerseys for sale

These old Mets alternate jerseys are returning

Nike Nike Official Replica Alternate Jersey New York Mets Blue

BCB After Dark: Are you coming, Michael Conforto? Chicago Cubs - Bleed Cubbie Blue

How do we fix the New York Mets -- Part I

Bochy 1 victory from another LCS appearance after Rangers beat Orioles 11-8 to go up 2-0 in ALDS

Authentic Women's Brandon Nimmo Royal Blue Alternate Home Jersey - #9 Baseball New York Mets Cool Base

A history of Mets road uniforms - Amazin' Avenue

NY Mets Show Off Two New Blue Alternate Jerseys – SportsLogos.Net News