Peterson rests, other practice highlights

Rookie Adrian Peterson was on the field, wearing his jersey. But he didn't participate in the morning practice. Vikings coach Brad Childress said the team wants to be careful with Peterson, who suffered a hip pointer last week.

He is day-to-day, and his status for Friday's preseason opener is unclear.

Here are some other notes from an eventful practice:

* The Vikings focused on third and long situations. The first defense didn't allow a first down on three of the four attempts, Childress said.

* TE Visanthe Shiancoe made one of his best catches of camp. He ran through a seam and Tarvaris Jackson led him with a nice pass. Shiancoe plucked the ball for what would have been at least 15 yards.

* Rookie WR Chandler Williams had a rough practice. He had a talk with coach Brad Childress, and he was targeted by receivers coach George Stewart. I wasn't privy to the discussions. But, it didn't sound like Stewart and Childress were congratulating him.

* RB Chester Taylor seems to be getting in a groove. He had a real nice catch and run from Jackson, and he seems to have his legs under him.