Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
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2021 New York Mets Jerry Koosman Number Retirement Night Bobblehead SGA 1969
Keith Hernandez stunned by Mets jersey retirement news - The San Diego Union-Tribune
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New York Mets retire Koosman's No. 36 - Taipei Times
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
NY Mets to retire Jerry Koosman's number next season, Jeff Wilpon says
JERRY KOOSMAN New York Mets 1969 Home Majestic MLB Throwback Jersey
Jerry Koosman- Mets All Time Lefthander (Part Three 1974-1985)
Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets announce plans to retire numbers of 1986 World Series champions Dwight Gooden and Darryl Strawberry