Simpson wakes up with injury

The Minnesota Vikings were trying to determine Monday why wide receiver Jerome Simpson woke up with numbness and weakness in his lower left leg that hindered him in the game against Tennessee. Coach Leslie Frazier said Simpson was undergoing MRI tests. Simpson played in parts of Minnesota's 30-7 win, but he didn't catch any passes. He had trouble pushing off because of the injury, which Frazier said could also be connected to his back.