Peterson has a mind freeze

CHICAGO -- Another example of how Minnesota is out of sorts Monday night: The Vikings temporarily benched tailback Adrian Peterson after he failed to fulfill his part in a pre-snap formation change on a first down at Chicago’s 20-yard line.

Peterson was lined up in a traditional I-formation when quarterback Brett Favre started motioning frantically for Peterson to move. Several coaches on the sideline did the same thing before Peterson moved into receiver’s position on the right side of the field.

Peterson was obviously the first read on the play, but he never got close to Favre’s pass into the end zone. Running backs coach Eric Bieniemy lit into Peterson on the sideline after sending in Chester Taylor to replace him.

The Vikings eventually scored on Favre’s 6-yard pass to tight end Visanthe Shiancoe. It’s 23-13 with 1:12 remaining in the third quarter.