April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research
Jerry Koosman number retirement set for June 13 - Amazin' Avenue
Jerry Koosman's No. 36 retired by Mets
Jerry Koosman's No. 36 to Be Retired By Mets in June – NBC New York
NY Mets honor legend Jerry Koosman by retiring No. 36 jersey
Jerry Koosman's No. 36 retired by Mets
Jerry Koosman's No 36 to be retired by Mets in June
Jerry Koosman: NY Mets legend on jersey retirement, World Series
Ed Kranepool must be next Mets number retired after Jerry Koosman: Pantorno – Metro US
Humble Jerry Koosman joins Mets hopefully-expanding pantheon with number retirement