2021 Donruss Red #241 Jason Giambi Retro A'sCard is serial numbered 1976/2021
Beckett.com
MLB Jason Giambi Signed Trading Cards, Collectible Jason Giambi Signed Trading Cards
SABR's Baseball Cards Research Committee – Page 25
Baltimore Orioles Price List - Supercollector Catalog
MLB Jason Giambi Signed Trading Cards, Collectible Jason Giambi Signed Trading Cards
Hunt Auctions, LLC
MLB Jason Giambi Signed Trading Cards, Collectible Jason Giambi Signed Trading Cards
Jason Giambi Baseball Oakland Athletics Sports Trading Cards & Accessories for sale
MLB Jason Giambi Signed Trading Cards, Collectible Jason Giambi Signed Trading Cards
MLB Jason Giambi Signed Trading Cards, Collectible Jason Giambi Signed Trading Cards
Jason Giambi Baseball Oakland Athletics Sports Trading Cards & Accessories for sale