How Ken Griffey Jr.'s rookie card became No. 1 for Upper Deck - ESPN

Ken Griffey Jr. trading card display at Hall of Fame lacking iconic Upper Deck rookie card - ESPN

Ken Griffey Jr. elected to National Baseball Hall of Fame

How Ken Griffey Jr.'s rookie card became No. 1 for Upper Deck - ESPN

The amazing story behind the rookie card that created the 90's trading card boom - Article - Bardown

The amazing story behind the rookie card that created the 90's trading card boom - Article - Bardown

Inside the baseball card boom: Mile High Card Company sells Babe Ruth rookie card for $2.46 million – Canon City Daily Record

Classic Baseball – ALL THINGS RED SOX

Ken Griffey Jr. - News - IMDb

Ken Griffey Jr. Baseball Cards: The Definitive Guide – Wax Pack Gods