Yeah, Steelers Nation had a moment of collective panic when Ben Roethlisberger was lying down of the ground and looked to have a right shoulder injury. As he would only exit for one play, a 2nd and 20 would face the 2nd year man Josh Dobbs, who was getting his first NFL snap which was not taking a knee.
Note, Dobbs had no time to warm up, so he was coming onto the field completely cold. Now, that does not mean that his arm is not warmed up, because while that is in fact true, his mental state as a whole is not warmed up.