Steelers WR Antonio Brown, fresh off a fine earned by stomping the Browns' punter in the face, exited tonight's game in Baltimore early after a massive hit on a pattern across the middle that left him, in the words of Jim Nantz, "dazed."
You can see he takes a shoulder to the head, so it wouldn't be out of the question to assume he's undergoing the NFL's concussion protocol. As we know, that doesn't mean much. We'll update if we get more information.
Update: Just as we hit publish: