Jerry Koosman Stats & Facts - This Day In Baseball

Mets News: Mets to retire Jerry Koosman's number 36 in 2020. - Amazin' Avenue

Kooz in The Big Apple - BallNine

Mets retire Willie Mays' No. 24 as Old-Timers' Day returns

Jerry Koosman – Society for American Baseball Research

The 2023 National By Proxy, Part 1

Most Strikeouts By A Pitcher In MLB History : r/baseball

Tom Seaver, Hall of Fame pitcher and Mets legend, dies at 75 - ESPN

New York Mets Stat of the Day, June 2021

This Date In Mets History: September 16 — 20 Wins for Koosman, 20 Triples for Johnson - Amazin' Avenue