EAGAN, Minn. (AP) — The Minnesota Vikings have placed quarterback J.J. McCarthy in the concussion protocol, putting his availability for the upcoming game at Seattle in question.

McCarthy first reported symptoms during the team's flight home from the 23-6 loss at Green Bay, coach Kevin O'Connell said Monday. The medical staff made the decision to put him in the protocol after returning to Minnesota, O'Connell said, and the Vikings hadn't identified a particular play when McCarthy might've taken a hit to the head.

“It had to be late, based upon how the game went,” O'Connell said.

O'Connell declined to answer specific questions about the severity or nature of McCarthy's symptoms. He did not rule McCarthy out for this Sunday but said rookie backup Max Brosmer would step in with the f

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