Humble Jerry Koosman joins Mets hopefully-expanding pantheon with number retirement
Ultimate Mets Database - Jerry Koosman
Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman Baseball Stats by Baseball Almanac
2021年美國職棒大聯盟球季
Ultimate Mets Database - Jerry Koosman
Thrilled to be 'joining a great crew,' Jerry Koosman, 78, has jersey retired by New York Mets - ESPN
Senga Recorded Eighth Consecutive Quality Start Tuesday - Metsmerized Online
Jerry Koosman: NY Mets legend on jersey retirement, World Series
18 and Life « Faith and Fear in Flushing
Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online
1978 Felix Millan, Topps Card Number 505 - Metsmerized Online