Vikings cornerback Patrick Peterson will miss at least three games with hamstring injury

Vikings cornerback Patrick Peterson was helped off the field in the fourth quarter Sunday.Patrick Peterson will be out at least a month after the Vikings placed the veteran cornerback on injured reserve Monday.

Peterson tapped the back of his right leg, indicating the hamstring injury, after chasing Panthers receiver D.J. Moore down the sideline at the end of the fourth quarter in Sunday's 34-28 win. With team athletic trainers holding him up, Peterson hopped off the field on his left leg before he was carted into the locker room.

The team announced Peterson's injury as cramps, saying he was questionable to return, but further testing revealed a significant strain that is not believed to be…