Basketball nickname

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Across
  1. 4. the iceman
  2. 5. the GOAT
  3. 8. the process
  4. 13. the beard
  5. 15. Dr. J
  6. 16. the brow
  7. 18. the king
  8. 19. the big fundamental
  9. 20. big panda
Down
  1. 1. showtime
  2. 2. flash
  3. 3. jimmy buckets
  4. 6. clyde the glide
  5. 7. the admiral
  6. 9. big ticket
  7. 10. the klaw
  8. 11. the mailman
  9. 12. the black mamba
  10. 14. the answer
  11. 17. slo mo