On August 9, 2002 â At the age of 26 years and 182 days, Vladimir Guerrero hits his 200th career home run, tying the Expos right fielder with Ken Griffey, Jr. as the second-youngest player to reach the 200 homer plateau. Alex Rodriguez is the youngest major leaguer to reach the 200 homer mark, reaching the milestone in 25 years 290 days.
Source:
Baseball Reference August 9
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