April 23, 1969: Jerry Koosman gets his first win in Mets' miracle
Mets' retired numbers
Mets retire Koosman's 36 five decades after '69 heroics
Mets announce Jerry Koosman number retirement date
Mets Uniform Numbers: The Best From Numbers 34-60 - Overtime Heroics
Summer of '69 by Mickey Strunak - Ebook
Mets retire Koosman's 36 five decades after '69 heroics - Seattle
Is Jacob deGrom of the New York Mets the best pitcher in baseball
Friendship, memories and a year with the 1969 New York Mets - ESPN
Why the Mets need to retire numbers now – Mets360
New York Mets - We will retire Jerry Koosman's number 36 in 2020
MLB History: Mets All-Time Starting Lineup (1969-2021) - Overtime