JERRY KOOSMAN New York Mets 1969 Home Majestic MLB Throwback Jersey

Jerry Koosman Autographed Jersey - Mets History

April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research

Uni Watch Middle East Report

Jerry koosman hi-res stock photography and images - Alamy

New York Mets 69 World Champs Lightweight Jersey Shirt

November 2019

Something Up Their Sleeves

Set Building – Page 2 – SABR's Baseball Cards Research Committee