On Aug. 31, 1990, Ken Griffey Jr. and Sr. became the first father-son teammates in MLB history
Griffey Jr.'s father recalls son's love of game, celebrates his election to Hall of Fame, New Today
Griffey Jr.'s father recalls son's love of game, celebrates his election to Hall of Fame, New Today
Ken Griffey Jr. - Wikipedia
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1991 Mother's Cookies Ken Griffey Jr K.Griffey Jr.& Sr. (Holding Gloves)
Ken Griffey Jr. Takes His Rightful Place in the HOF - Sports Collectors Digest
1990 Post Cereal Ken Griffey Jr
August 31, 1990: Ken Griffey Jr. and Sr. get back-to-back hits in father-son debut with Mariners – Society for American Baseball Research
Ken Griffey Baseball Stats by Baseball Almanac
Griffey Jr. and Sr. hit back-to-back home runs for Mariners
When Ken Griffey Sr. humorously 'grounded' Ken Griffey Jr. for catching a fly ball in his territory while playing with the Seattle Mariners
