September 30, 1979: Jerry Koosman reaches 20-win plateau for second time – Society for American Baseball Research
Jerry Koosman - Wikipedia
Mack's Mets: FROM 2006- RETRO-POST ON JERRY KOOSMAN Koosman Shuts The Door! - Jerry Koosman- Hall-Worthy & On Par With Zito!!!
Tom Seaver's health serves as a reminder of last hurrah for '69 Mets - Newsday
Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman Stats & Facts - This Day In Baseball
Jerry Koosman Baseball Stats by Baseball Almanac
Jerry Reuss Stats & Facts - This Day In Baseball
Mathew Brownstein on X: Most strikeouts by a rookie pitcher in #Mets history: Dwight Gooden: 276 (1984) Jerry Koosman: 178 (1968) KODAI SENGA: 176 (2023) Tom Seaver: 170 (1967) : r/NewYorkMets
1968 jerry koosman nolan ryan Values - MAVIN
Ultimate Mets Database - Jerry Koosman
Jerry Koosman: NY Mets legend on jersey retirement, World Series
NY Mets: Jerry Koosman had an all-time great World Series in 1969
This Date In Mets History: September 16 — 20 Wins for Koosman, 20 Triples for Johnson - Amazin' Avenue
Jerry Koosman on Tom Seaver, 09/03/2020