7. Roy Williams – Cowboys & Bengals:
Williams was a great safety in his own right, but he became notorious for injuring players with the now-banned horse collar tackle throughout his career. His most famous incident of such a hit was when he broke former Philadelphia Eagle Terrell Owens’ leg with one.
He injured three players using horse collar tackles in the 2004 season alone. Because of his dirty hits, Williams was fined by the NFL and earned a spot high on this list.