His baseball cards, especially his rookie cards, have been invaluable and highly sought after by collectors since the late 1980s. Here’s a list of Ken Griffey Jr.’s most valuable cards.

1994 Upper Deck Mickey Mantle/Ken Griffey, Jr. (DUAL AUTO) / Click image for eBay source listing In 1994 the baseball card scientists at Upper Deck came up with the formula for one of the hottest ...

The Ken Griffey Jr. Tops Rookie Card is highly coveted by collectors and baseball enthusiasts. Produced by Topps in 1989, this card captures a pivotal moment in Griffey Jr.'s career as he burst ...

Coming in at the top spot is a 1990 Topps rookie card with a ton of errors and misprints. The card is a true 1/1, making it $700,000. Next on the list is another 1990 Topps rookie card for $399,999.

“Oh — it’s Ken Griffey Jr.” Yes, the Hall of Famer ... The super-cool slugger whose likeness graced some of the most iconic baseball cards of all time was set to take the photos for ...

Ohtani ranks No. 2 only behind Hall of Famer Ken Griffey Jr. for the most baseball cards graded by industry leader PSA (Professional Sports Authenticator) and led all players with the most cards ...

Though Ken Griffey Jr.’s 1989 Upper Deck rookie card is by far his most famous card — and among the most iconic in history — it isn’t his most valuable card. That distinction currently ...