The NFL Competition Committee is debating whether to outlaw the "horsecollar" style of tackling that Roy Williams used when he broke Eagles WR Terrell Owens' leg. According to a committee member, Williams injured four players with that style of tackle last year.
Update: The NFL Competition Committee is determined to make a change, but is still uncertain as how to proceed. What is certain is that some version of this rule will be implemented; no less an authority than Jerry Jones says so.