Arizona Cardinals wide receiver Marvin Harrison Jr. entered the concussion protocol after a hit in Sunday’s loss to the Green Bay Packers, Alex Weiner of Arizona Sports reports.

Arizona Cardinals wide receiver Marvin Harrison Jr. entered the concussion protocol after a hit in Sunday’s loss to the Green Bay Packers, head coach Jonathan Gannon said on Monday.

Harrison was helped off the field in the second quarter after taking a shot to the head on an incomplete pass, as his helmet crashed into the upper leg of Packers linebacker Isaiah McDuffie.

The rookie fell back down after standing up before being tended to. He entered the blue medical tent, walked back to the locker room and was ruled out with a concussion.

Harrison was helped off the field in the second quarter after taking a shot to the head on an incomplete pass, as his helmet crashed into the upper leg of Packers linebacker Isaiah McDuffie.

The rookie fell back down after standing up before being tended to. He entered the blue medical tent, walked back to the locker room and was ruled out with a concussion.

Harrison finished the game without a catch on two targets.

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