Rams defensive coordinator Gregg Williams is apologizing for his part in an improper "pay for performance" program he was a part of when with the New Orleans Saints.  The NFL announced Friday that a three-year investigation determined Williams organized a "bounty" system that financially rewarded Saints defenders for taking out opposing players.  The payments are a violation of NFL policy.  In his apology, Williams called it a terrible mistake and said they knew it was wrong while they were doing it.  Williams left the Saints in January to become the new defensive coordinator of the St. Louis Rams.  He's likely to face disciplinary action from the NFL.