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

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

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

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Griffey Jr. and Sr. hit back-to-back home runs for Mariners

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Ken Griffey Jr and Ken Griffey Sr Autographed Father / Son Teammates G –

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Ken Griffey Jr. and Sr. hit back-to-back home runs

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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

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

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