What is Grit? Crossword Puzzle

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Across
  1. 2. carefully examining something for mistakes
  2. 5. father of American football
  3. 8. the requirement that a team give up the ball after failing to move a specified distance
  4. 10. supports or keeps going
  5. 11. relating to a serious bodily injury
  6. 12. thinking back on the good ol' days
  7. 14. put into place or action
  8. 16. a field marked with vertical lines
  9. 17. ancient English sport
  10. 19. state of unconsciousness due to brain injury
  11. 21. sad; depressing
  12. 22. minor brain injury
  13. 24. intense emotion or activity
Down
  1. 1. stuck to playing the "Boston Game"
  2. 3. name of Zack's team
  3. 4. team Walter Camp coached until 1892
  4. 6. wild with fear and worry
  5. 7. ________ NFL changed their graphics to no longer glamorize head injuries
  6. 9. occurring first or at the beginning
  7. 13. excellent
  8. 15. _________ vs. Rutgers--first collegiate football contest
  9. 18. make something appear more attractive than it really is
  10. 20. while coaching Camp worked at a ______ manufacturing firm
  11. 23. playing through the ______ is no longer acceptable