Mets will retire Jerry Koosman's number in 2020 – New York Daily News
Tom Seaver, heart and mighty arm of Miracle Mets, dies at 75
Mets to retire numbers for Doc Gooden and Darryl Strawberry – NBC New York
Tom Seaver, heart and mighty arm of Miracle Mets, dies at 75 - Boston News, Weather, Sports
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Jerry Koosman's No 36 to be retired by Mets in June
Mets should retire Jerry Koosman's number this year regardless of 2020 season outcome
Mets to Retire Jerry Koosman's Jersey - The New York Times
Keith Hernandez Caught Off Guard By Jersey Retirement, Reveals Mets' Old-Timers' Day Plans - Sports Illustrated New York Mets News, Analysis and More
Mets to Retire Jerry Koosman's Jersey - The New York Times
April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research
Mets announce Jerry Koosman number retirement date –
New York Mets - Wikipedia
