Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
Three Degrees of Mets World Series Separation: Koosman to Orosco to Cuddyer - WSJ
Jerry Koosman (2003) – Society for American Baseball Research
Remembering Mets History (1975) Jerry Koosman Wins 100th Career Game
Mets COTW: 1979 Topps Jerry Koosman – Mets360
Dwight Gooden to Pitch in New York Mets' Old Timers' Game - Sports Illustrated New York Mets News, Analysis and More
Jerry Koosman – Society for American Baseball Research
1969 World Series - Wikipedia
i love morris: I remember the parade for him in Morris
Art Shamsky details Tom Seaver's health issues in new book - Newsday
Jerry Koosman is only Mets pitcher with this unusual accolade