Ultimate Mets Database - Jerry Koosman
1978 topps jerry koosman Values - MAVIN
Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman: All Time Mets Left Handed Pitcher (Part Two-1973-1978)
Jerry Koosman Sets Early Franchise Record - Mets History
Heroes of '69: Jerry Koosman Lived For The Big Games - Metsmerized Online
Hall of Fame honorable mentions: Pitchers - Amazin' Avenue
Jerry Koosman – Society for American Baseball Research
Jerry Koosman: All Time Mets Left Handed Pitcher (Part Two-1973-1978)