quarterback Kyle Allen was carted back to the locker room in the first quarter of Sunday's game against the .
Giants safety Jabrill Peppers was rushing off the edge when a block from Antonio Gibson knocked him off balance and into the lower right leg of Allen.
Alex Smith took over for Allen at quarterback, and the team confirmed the 24-year-old is out with an ankle injury.
This article will be updated to provide more information on this story as it becomes available.
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