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

Calm Carter keeps getting on base for Rangers. Bochy wonders if the kid even realizes he's in majors –

Minimalist Mr. Met New York Mets - S. Preston – S. Preston Art + Designs

Mets drop both games of doubleheader to powerhouse Braves

NFT: Mets vs Yankees: Game 2 - 7:10 pm ET - Mets Fans thread ONLY

New Mets Alternate Uniform? Could this be real? : r/NewYorkMets

New York Mets Blue MLB Jerseys for sale

Andres Gimenez #60 - Team Issued Blue Alt. Road Jersey with Seaver Patch - 2020 Season

New York Mets 2022 Top 10 MLB Prospects Chat — College Baseball, MLB Draft, Prospects - Baseball America

Last Friday, the Mets had auctioned off the 9/11 jerseys they wore this year, with the proceeds going towards 9/11-related charities. To the regret of my wallet, I actually was able to win one. : r/NewYorkMets