James J. Jeffries , Jack Johnson , Bob Fitzsimmons , and later Jack Dempsey were the names that inspired during those years .
Jack Dempsey grew up a lover of all contests of violent , masculine struggle .
James J. Jeffries , Jack Johnson , Bob Fitzsimmons , and later Jack Dempsey were the names that inspired during those years , and he grew up a lover of all contests of violent , masculine struggle .