This is a Mike Yastrzemski Signed San Francisco Giants jersey. It is an authentic autograph. Jersey comes with MLB Certification # VS 911981
2016 Topps Strata Baseball Checklist, Set Info, Boxes, More
1956–1968 – SABR's Baseball Cards Research Committee
Official Mike Yastrzemski San Francisco Giants Collectibles, Mike Yastrzemski Giants Collectible Memorabilia, Autographed Merchandise
Giants make crucial Mike Yastrzemski decision
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PSA Magazine: 2022 August #008 by PSA Magazine - Issuu