A tweet from the Browns confirmed Manziel was on the pre-practice injury report for a concussion. He complained of concussion-like symptoms when he arrived at the team’s facility Wednesday.

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Browns coach Mike Pettine said Manziel will start Sunday if he’s cleared. Austin Davis would start against the Steelers if Manziel can’t play, and Terrelle Pryor took snaps in practice Wednesday as an emergency option.

It’s unclear the circumstances around Manziel’s symptoms, and the Browns said they were unaware of when he was injured.