Green was a limited participant in Wednesday's practice. He reported having concussion-like symptoms on Tuesday, the players' day off, coach Mike McCoy said.
Green was injured in Sunday's loss at Cincinnati, the team said.
The tight end suffered a concussion Dec. 7 in a home loss to New England and missed the final three games.
On Sept. 9, Green was examined for concussion-like symptoms after practice. He played in a season-opening win against Detroit four days later.
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