Ben Roethlisberger is expected to miss a few weeks with a mid-foot sprain.
The Steelers initially suspected Roethlisberger had a LisFranc injury to his left foot.
Roethlisberger suffered the injury on a sack by Aldon Smith.
"Ben is our franchise quarterback," Antonio Brown said. "We live and die with him. ... Hopefully he can be with us."