9-0 is something that even the great Chuck Noll was ever able to accomplish as he led what is arguably the greatest dynasty in the history of the NFL—or at least the greatest of the Super Bowl era—or, at least, the greatest of the Super Bowl era prior to free agency.
That’s not to take away from the greatest head coach in Pittsburgh Steelers history, and one of the great all-time coaches—after all, he did go 7-0 once, and was able to go 4-0 three times, something that Bill Cowher never did, and that head coach Mike Tomlin never did until 2020, a winning streak that he has now run up to a franchise-record nine games to start the season.