Cincinnati Reds - Today in Reds history, 2000: Ken Griffey Jr. at age 30 becomes, at the time, the youngest player in MLB history to reach 400 home runs with a solo
Ken Griffey Jr. – Society for American Baseball Research
Ken Griffey Jr., the youngest player in the majors, hits his first career homer on the first pitch he ever sees at his home ballpark, the Kingdome. - This Day In Baseball
Cincinnati Reds - Today in Reds history, 2000: The Reds acquire Ken Griffey Jr. in a trade with Seattle. Junior will play nine seasons for his hometown team, collecting a .270 batting
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The best of 'The Natural,' Ken Griffey Jr. - Sportspress Northwest
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April 10, 2000: Ken Griffey Jr. becomes youngest player to hit 400 home runs – Society for American Baseball Research
Cincinnati Reds - Today in Reds history, 2000: Ken Griffey Jr. becomes the youngest player to reach 400 home runs with a solo shot against the Rockies at Coors Field.
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Griffey's 400th homer sets new standard
The best of 'The Natural,' Ken Griffey Jr. - Sportspress Northwest
Ken Griffey Jr., Who Retired in 2010, Is Among Highest-Paid Players on the Cincinnati Reds
Every single player in MLB history to have multiple 50+ HR seasons : r/ baseball
Ken Griffey Jr. Will Reportedly Be 6th Highest Paid Player on Cincinnati Reds 2022 Payroll Despite Retiring in 2010