Viking quarterback Tarvaris Jackson reportedly has a strained MCL in his right knee that he sustained Saturday night in the Vikings 23-15 win over the Baltimore Ravens.  Jackson sustained the injury scrambling for a first down late in the first quarter.  He left the game after staying in for a couple of plays but left and didn't return in the first quarter.   Jackson was 7-11 passing for 82 yards and a touchdown for Minnesota before the injury.  Jackson's status for this Saturday's game against Pittsburgh is uncertain.  The Vikings host the Steelers Saturday night at 7pm, pregame on AM 1390-the Fan at 6pm.