Today In 1990: Ken Griffey & Ken Griffey Jr. of the Seattle Mariners hit back-to-back singles as the first father-son duo to play in the same major league lineup!

WATCH: Father & son Griffey hit back-to-back HRs

Ken Griffey Jr. MLB Memorabilia, Ken Griffey Jr. Collectibles

Griffeys hit back-to-back home runs in 1990

Pin on Griffey Jr.

Ivan Melendez Homers for the First Time as a Pro

Sept. 14, 1990: When the Griffeys made history with back-to-back

Ken Griffey Jr. 1990 Upper Deck 156 Seattle Mariners Spelling

Ken Griffey Jr. MLB Memorabilia, Ken Griffey Jr. Collectibles

KEN GRIFFEY SR. & JR BACK TO BACK HOMERUNS #kengriffey

On This Day In Sports: August 31, 1990: Griffey Sr. and Jr. Become

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