Mets to retire 1969 World Series hero Koosman's number in August
NY Mets to retire pitcher Jerry Koosman's number next season
1969 Topps # 90 Jerry Koosman New York Mets (Baseball
April 23, 1969: Jerry Koosman gets his first win in Mets' miracle
Jerry Koosman New York Mets Custom Baseball Card 1967 Style
Mets Pitcher Named an All-Star
Jerry Koosman
Thrilled to be 'joining a great crew,' Jerry Koosman, 78, has
Jerry Koosman – Society for American Baseball Research
Jerry Koosman: All Time Mets Left Handed Pitcher (Part One: 1967-1972)
Jerry Koosman in . . . The Franchise All-Time All-Stars
Jerry Koosman to Have Number Retired on August 28, 2021
This Date in Mets History: June 24 — Koosman wins 100th game, Mets