Good morning fantasy football world.  Yesterday was one of the worst days in recent memory for a lot of us owners.  To cap the night, Vernon Davis was carted off the field in the 4th quarter of Sunday Night Football between the San Francisco 49ers and the Chicago Bears.  It is rumored to be a high ankle sprain, and it could sideline him for weeks.  Vance McDonald also suffered an injury on SNF.  The Niners will most likely run the ball more often with Frank Gore and Carlos Hyde and this should push some extra targets towards Michael Crabtree and Anquan Boldin.  Davis was last seen on crutches.