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Arizona Cardinals wide receiver Marvin Harrison Jr. was ruled out during the team's clash with the Green Bay Packers on Sunday due to a concussion.
The rookie's head collided with Packers linebacker Isaiah McDuffie's leg following an incomplete pass in the second quarter. Harrison briefly stood up before collapsing on the field. He was able to return to his feet and walk off with the help of Arizona's medical staff.
Harrison was targeted twice before he exited the contest, finishing with zero catches.
This article will be updated soon to provide more information and analysis.