Are MLB contracts fully guaranteed?

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Tags

1. #fully
2. #league
3. #player
4. #money
5. #players
6. #agreed
7. #contracts
8. #promised
9. #major
10. #either
11. #obtain
12. #those
13. #agency
14. #extensions
15. #breaks
16. #salary
17. #guaranteed
18. #amount
19. #contract
20. #arbitration