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Steelers tight end Ladarius Green is in the NFL’s concussion protocol, Steelers coach Mike Tomlin told reporters after Sunday’s win at Cincinnati.

Green took a big hit in the fourth quarter and did not return. Green has a history of concussions, so it’s alarming to hear that he’s in the protocol.

Green had five catches for 72 yards in Sunday’s game and had been productive in recent weeks. He started the season on the physically unable to perform list but the Steelers and Green insisted it was because of his ankle injury and not due to rumored headaches.