GREEN BAY, Wis. – Arizona Cardinals wide receiver Marvin Harrison Jr. was ruled out of the remainder of Sunday’s game against the Green Bay Packers due to a concussion.

The fourth overall pick went down with 6:28 left in the second quarter when his head collided with the thigh of Packers linebacker Isaiah McDuffie after a pass to Harrison fell incomplete.

Harrison was helped off the field by Cardinals trainers and, after being evaluated in the blue injury tent on the sideline, left the field and was escorted to the locker room by a team of Arizona trainers and doctors.

Shortly after the start of the second half he was sent off.

Harrison had no catch on two targets on Sunday.