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

Brandon Nimmo ends up the hero in Mets' victory over Yankees

RARE - Vintage - True Fan - New York Mets - Blue & Orange Jersey - Youth Large

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

Tim Locastro #26 - Game Used Jackie Robinson Day Jersey and Hat Combo - 0-1, R, SB - Mets vs. Athletics - 4/15/23

2023 MLB Uniform Rankings

3 NY Mets players who've sealed their fate in the final weeks of the 2023 season

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

RARE - Vintage - True Fan - New York Mets - Blue & Orange Jersey - Youth Large

How the Mets honored 9/11 heroes amid the coronavirus pandemic

Picked up this 2021 Jerry Blevins Mets road alternate jersey the other night at Citi Field! : r/baseballunis

Official New York Mets Website

Tampa Bay Rays trade LHP Brooks Raley to the New York Mets - DRaysBay