Remembering Mets History (1975) Jerry Koosman Wins 100th Career Game
September 30, 1979: Jerry Koosman reaches 20-win plateau for
Induct Jerry Koosman Into Hall of Fame
Jerry Koosman's Mets number retirement is finally here
Best left-handed starters in Mets history
Mets retiring No. 36 of ex-pitcher Koosman in '20 - ESPN
Jerry Koosman: All Time Mets Left Handed Pitcher (Part One: 1967-1972)
The perpetually underrated Jerry Koosman – Mets360
Remembering Mets History (1975) Jerry Koosman Wins 100th Career Game
Jon Matlack, Tom Seaver and Jerry Koosman. I cannot understand why
Jerry Koosman to Have Number Retired on August 28, 2021
Mets to Retire Jerry Koosman's Jersey - The New York Times
New York Mets news: Jerry Koosman's No. 36 will be retired next year