The Vikings will have to play the rest of the preseason and possibly beyond without defensive tackle Kevin Williams. Williams saw a foot specialist this week and revealed the severity of the injury Tuesday. Williams plans to rest for precautionary reasons. He may also be suspended for 2 games to begin the season for a violation of the NFL substance abuse policy for taking a banned diuretic (StarCaps) in 2008. Sources close to the NFL expect a decision to come down before season begins.