1986 Topps #505 Jerry Koosman VG Philadelphia Phillies - Under the Radar Sports
The Athletic's 25 Most Iconic Sports Cards of All Time - The Athletic
PSA Magazine: 2022 September #009 by PSA Magazine - Issuu
1980 Topps #437 Joe Niekro VG Houston Astros - Under the Radar Sports
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Baseballs, Vintage Sports Memorabilia, Sports Mem, Cards & Fan Shop - PicClick
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1986 Donruss #23 Jerry Koosman DK NM-MT Philadelphia Phillies
PSA Magazine: 2023 February #014 by PSA Magazine - Issuu
PSA Magazine: 2023 February #014 by PSA Magazine - Issuu
Other Autographed MLB Items, Baseball-MLB, Autographs-Original, Sports Mem, Cards & Fan Shop - PicClick
1980 Topps #437 Joe Niekro VG Houston Astros - Under the Radar Sports
PSA Magazine: 2023 February #014 by PSA Magazine - Issuu
PSA Magazine: 2023 April #016 by PSA Magazine - Issuu
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1985 Topps #15 Jerry Koosman VG Philadelphia Phillies
1984 Fleer #53 Salome Barojas VG Chicago White Sox - Under the Radar Sports
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