Jackson injures knee

Vikings QB Tarvaris Jackson has left the playing field at training camp with a left knee injury.

Training camp's first scary moment happened more than halfway through Saturday morning's practice as Tarvaris Jackson went down with a knee injury. Jackson, who stepped around defensive tackle Letroy Guion to throw a pass, twisted his left knee and fell to the ground in pain.

He was immediately attended to by head trainer Eric Sugarman, quarterbacks coach Kevin Rogers and head coach Brad Childress. After a couple of minutes, Jackson was able to leave the field under his own power.

"Things were moving fast and I really didn't see what happened," Guion said after practice.

Jackson went to the medical tent and shortly thereafter walked across the street to the locker room and didn't return to practice.

Offensive coordinator Darrell Bevell didn't have an immediate update on the situation after practice, but described the situation from his vantage point.

"I'm watching so many things on the play. I'm watching him and then he started to move," he said. "I moved my eyes and then he was down, so I didn't exactly see what happened. We'll go back in and look at the tape and I'll be able to tell you better."

"... Whether it's Tarvaris or any of your guys. You don't want to see any of your guys go down, no matter who it is, whether it's your quarterback or your third tight end. It doesn't matter. You never like to see anybody have any type of injury."

While Jackson was able to walk off the field under his own power, it remains a cause for concern for the Vikings, who will likely have the knee evaluated today.

Pro Football Talk is reporting that it's a Grade I sprain of the medial collateral ligament, which puts Jackson at day-to-day, according to a source cited by the web site.

Viking Update will update this story as more information becomes available.

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