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

Today In 1990: Ken Griffey Sr. & Ken Griffey Jr. of the Seattle Mariners become the first and only father-son duo to hit a HR in the same major league game with

In 1990, the Griffeys became the first father-son pair to play in the same Major League lineup

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

Ken Griffey Jr. Takes His Rightful Place in the HOF - Sports Collectors Digest

Ken Griffey Sr. and Jr. become first father/son combo to appear in the same lineup

The Life Of Ken Griffey Jr.

Ken Griffey Jr. And His Dad Once Hit Back-To-Back Home Runs

Vladimir Guerrero joins Vladimir Sr. as first father-son Home Run Derby winners

Field of Dreams Game: Ken Griffey Jr. and dad play catch, fans love it

Ken Griffey Jr., Sr. share a catch at 'Field of Dreams' game

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

Bobby and Barry Bonds, Ken Griffey Jr. and Ken Griffey Sr.: Baseball fathers and sons – New York Daily News

Ken Griffey Sr. and Jr. become first father/son combo to appear in the same lineup

5 awesome stories we heard from Griffey this week

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