The youngest players to reach 400 career home runs in the major
leagues:
Yrs Days
1. x-Alex Rodriguez 29 316
2. Ken Griffey Jr. 30 141
3. x-Albert Pujols 30 222
4. Jimmie Foxx 30 248
5. Mickey Mantle 30 325
6. Eddie Mathews 31 185
7. Frank Robinson 32 9
x-active