9 things you didn't know about the Ken Griffey Jr. 1989 Upper Deck

David Gonos reveals nine intriguing facts about Upper Deck's 1989 Ken Griffey Jr. card, one of the most popular baseball cards of all-time.
David Gonos reveals nine intriguing facts about Upper Deck's 1989 Ken Griffey Jr. card, one of the most popular baseball cards of all-time.

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9 things you didn't know about the Ken Griffey Jr. 1989 Upper Deck

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9 things you didn't know about the Ken Griffey Jr. 1989 Upper Deck