1990 Upper Deck Baseball Ken Griffey Jr. #24 is a base trading card featuring Ken Griffey Jr. as a member of the Seattle Mariners. This early-career Upper Deck issue is one of the set's team checklist cards, pairing Griffey with the Mariners checklist during the junk wax era. Player: Ken Griffey Jr. Team: Seattle Mariners Set: 1990 Upper Deck Baseball Card Number: 24 Year: 1990 eBay average sold price: $1.08 (30 sold).