The Tennessee Titans quarterback is strong on his feet, recording 291 rushing yards from 41 carries for an average of 7.1 yards per carry.
The head coach told the Steelers's official website: "Not only does he break you down in terms of scrambling and creating and running in the mis-direction passing game, but the Titans have some prescribed runs where they design some things, a quarterback-lead-draw, some quarterback sweep stuff, that make them legitimate, particularly in situational football.
"We still have to rush hard. We cannot allow that to minimise our rush in terms of what we do to get after him, but we also have to rush smart. We have to be conscious of our rush lanes, we have to collapse the pocket, we cannot allow him to have loose escape lanes.
"This game is going to be decided on those special plays, third downs, red zone, goal line."
The Steelers play the Titans later today.