What is the point of NFL Preseason?

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Tags

1. #teams
2. #several
3. #before
4. #actual
5. #during
6. #exhibition
7. #record
8. #starts
9. #which
10. #league
11. #intrinsically
12. #national
13. #training
14. #start
15. #season
16. #period
17. #preseason
18. #regular
19. #football
20. #games