According to the Mariner's team checklist on Beckett.com, the card is an insert autograph ... Major League Baseball Hall of Famer Ken Griffey Jr. is introduced prior to the Mariners Hall of ...

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 ...

A Ken Griffey parallel card from the 1998 Skybox E-X 2001 set has surfaced at auction for the first time in nearly 20 years. The Ken Griffey Essential Credentials Now parallel numbered out of 10 ...