A league source tells us that Vikings quarterback Tarvaris Jackson has undergone an MRI to gauge the extent of the damage he suffered today during a training-camp scrimmage.
Per the source, Jackson suffered an MCL sprain.
Initial word is that it’s only a Grade I sprain, and that Tarvaris might be day-to-day.
If it’s Grade II or worse, however, Jackson likely would miss multiple weeks -- which likely would make Sage Rosenfels the Week One starter by default.
Meanwhile, we’re still wondering why in the hell defensive lineman Letroy Guion’s body made contact with the red-shirted Jackson.
“I don’t know,” Guion told Sean Jensen of the St. Paul Pioneer Press regarding the cause of the injury. “It was the heat of the moment. Things were moving fast.”
Apparently, the Vikings would be wise to replace the red jersey with a portable plastic bubble.