Jerry Koosman Stats & Facts - This Day In Baseball
Jerry Koosman Stats, Fantasy & News
Jerry Koosman Baseball Stats by Baseball Almanac
Ultimate Mets Database - Jerry Koosman
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Heroes of '69: Jerry Koosman Lived For The Big Games - Metsmerized Online
Jerry Koosman interview
Nolan Ryan / Jerry Koosman (New York Mets) 1968 Topps Baseball #177 RC Rookie Card - PSA 9 OC (Silver Label) (E)
Mets to Retire Jerry Koosman's Jersey - The New York Times
Tom Seaver - Wikipedia
Mets set to pay tribute to Jerry Koosman - Newsday
New York Mets Stat of the Day, June 2021
