Arizona Cardinals rookie wide receiver Marvin Harrison Jr. left Sunday's game against the Green Bay Packers to be evaluated for a concussion after colliding headfirst with linebacker Isaiah McDuffie's thigh. Harrison appeared wobbly and stumbled upon trying to get up, leading to his immediate removal from the game for medical evaluation. Prior to this incident, Harrison had been leading the Cardinals with 279 receiving yards and four touchdowns for the season. His absence was felt as the Cardinals trailed the Packers 24-7 in the second quarter. The incident is part of a broader issue in the NFL, as multiple players, including Saints receiver Chris Olave, sustained head injuries over the weekend. Harrison's condition remains uncertain as further updates are awaited.