On Aug. 31, 1990, Ken Griffey Jr. and Sr. became the first father-son teammates in MLB history
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On This Day In Sports: August 31, 1990: Griffey Sr. and Jr. Become the First Father/Son Duo to Play Together in The Majors
The Griffey's: A father-son tale of when Ken Griffey Jr played professional baseball with his Dad
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New Era Of Draft Began With Griffey — College Baseball, MLB Draft, Prospects - Baseball America
On Aug. 31, 1990, Ken Griffey Jr. and Sr. became the first father-son teammates in MLB history
Ken Griffey Sr. and Jr. become first father/son combo to appear in the same lineup
ken griffey father & son Values - MAVIN
Rare photos of Ken Griffey Jr. and family
Ken Griffey Sr. and Ken Griffey Jr. Make Father-Son History With Back-to-Back Home Runs - FanBuzz
In 1990, the Griffeys became the first father-son pair to play in the same Major League lineup
When Ken Griffey Sr. humorously 'grounded' Ken Griffey Jr. for catching a fly ball in his territory while playing with the Seattle Mariners
Ken Griffey Baseball Stats by Baseball Almanac
Bobby and Barry Bonds, Ken Griffey Jr. and Ken Griffey Sr.: Baseball fathers and sons – New York Daily News
