Cincinnati Reds on X: April 10, 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 shot

Griffey's 400th homer sets new standard

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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.

⚾️On April 10, 2000 Cincinnati's Ken Griffey Jr. becomes the youngest player in major league history to hit 400 home runs when he goes deep into the, By Davenport Sports Network

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