Steelers quarterback Ben Roethlisberger left Sunday's overtime loss to the Chiefs with a possible concussion. Roethlisberger had thrown for 398 yards and three touchdowns when he appeared to take a knee to the helmet while being sacked in the extra period. "He took a blow, needless to say, it was a concussion-oriented thing so I doubt he was going to come back into the football game," Pittsburgh coach Mike Tomlin said. "I don't have a lot of information in terms of where he is or his level of availability. We will have more information as we proceed."