Why are there no metal bats in MLB?

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Tags

1. #aluminum
2. #comes
3. #league
4. #hardness
5. #speeds
6. #college
7. #levels
8. #dominate
9. #required
10. #players
11. #major
12. #baseball
13. #little
14. #wooden
15. #resilience
16. #result
17. #addition
18. #lower
19. #greater