Why do MLB teams put players on waivers?

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Tags

1. #assigned
2. #league
3. #clears
4. #hours
5. #roster
6. #minor
7. #teams
8. #contract
9. #makes
10. #outright
11. #waivers
12. #player
13. #which
14. #other
15. #places
16. #removed
17. #claim
18. #outrighting
19. #awarded