Who was the youngest player to hit 250 home runs?

The youngest was Jimmie Foxx, who reached the 250 home run plateau at the age of 26 years, 269 days. Following him are Eddie Mathews (26 years, 320 days), Mel Ott (27 years, 94 days), and Ken Griffey, Jr. (27 years, 155 days). Soon to join this group is wunderkind Alex Rodriguez of the Texas Rangers (currently at 207 HR and 25 years, 325 days).