Ken Griffey Sr. and Jr. become the first father-son duo to ever

1991 Mother's Cookies Ken Griffey Jr Ken Griffey Sr

Seattle Mariners KEN GRIFFEY JR. & SR. "Father & Son Home Runs" Bobblehead NIB!

Ken Griffey Jr. and Sr. Hitting Back-to-Back Home Runs is Still the Coolest Father-Son Moment in Sports History

ESPN - On this date in 1990, Ken Griffey Sr. and Ken Griffey Jr. became the first father-son duo to play on the same team. [Credit: Focus on Sport/Getty Images]

Vladimir Guerrero joins Vladimir Sr. as first father-son duo to win Home Run Derby

Ken Griffey Jr & Ken Griffey Sr Seattle Mariners Back to Back Home Run FOCO

Ken Griffey Jr & Ken Griffey Sr Seattle Mariners Back to Back Home Run FOCO

Today in Baseball: The First Father And Son Combo on The Same Team

Ken Griffey Sr. and Jr. become the first father-son duo to ever play together

The Griffey's: A father-son tale of when Ken Griffey Jr played professional baseball with his Dad

Ken Griffey Jr. – Society for American Baseball Research

The Junior Junkie: the Baseball Cards of Ken Griffey, Jr. and Beyond: Happy Father's Day: the Griffeys on Cardboard

The Junior Junkie: the Baseball Cards of Ken Griffey, Jr. and Beyond: Happy Father's Day: the Griffeys on Cardboard

Ken Griffey, Jr., Biography, Statistics, & Facts