His baseball cards, especially his rookie cards, have been invaluable and highly sought after by collectors since the late ...

The man with the sweetest swing to ever play the game of baseball. Check that, The Kid, with the sweetest swing to ever play the game, just set a record. Ken Griffey Jr. 's 1998 Skybox card sold ...

RELATED: The Most Impressive Ken Griffey, Jr., Collection in the World Griffey Super Collector Jason Vass / Jason Vass So just what are the Impossible Baseball Cards of Ken Griffey, Jr?

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 ...