Liga MX brawl: Everything we know about the match that turned violent - Los Angeles Times
Everything you need to know about Calcio Storico, Italy's most violent tradition - The Local
Paul Gardner: Why is football ignoring the problem of goalkeeper violence?
Violence of football is becoming too difficult to justify – The Denver Post
The History of Rugby: The Most Brutal Sport
Dolphins 20, Patriots 7: Mistakes send Patriots to season-opening loss
The World's Most Dangerous Game of Football, Calcio Storico
Injuries make the NFL a brutal sport. But the violence is partly why fans love it
Why do sports sometimes spur violence among rival fans?
Violence and the N.F.L. - The New York Times