The 5 Most Expensive Baseball Cards That You Can Purchase Right Now
1969 Topps Deckle Edge #25 Jerry Koosman 3 - VG
90 Jerry Koosman - 1969 Topps Baseball Cards (Star) Graded EXMT
1970 Topps Lou Brock Jim Palmer Lou Piniella & Jerry Koosman
Cody's Favorite vintage set: 1970 Topps? '70??
SCF - TTMM player address report
Lot Detail - 1968 Topps Mets Rookies #177 Jerry Koosman/Nolan Ryan Rookie Card - PSA VG 3 (MC)
1968 Topps #177 Nolan Ryan, Jerry Koosman Rookie Card - SGC VG 3 on Goldin Auctions
Baseball In Pics - Tom Seaver, Jerry Koosman, and Nolan Ryan in the locker room, 1969
#90 Jerry Koosman - 1969 Topps Baseball Cards (Star) Graded EXMT
Mavin Jerry Koosman 1969 Topps Deckle Edge FGS 9