Roethlisberger was injured just before halftime when he was knocked to the ground by linebackers Willie McGinest and D'Qwell Jackson and his head bounced off the turf.
After being worked on for nearly 15 minutes, he was carted to the locker room. The crowd cheered when Roethlisberger flashed a thumb's-up sign.
He was diagnosed with a concussion and "at this point, all tests are negative, which is positive,'' coach Mike Tomlin said. "We are optimistic of where he is going to be capable of being.''
Roethlisberger was taken to a local hospital. He was expected to remain overnight.
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