Noll transformed the Steelers from a long-standing joke into one of the NFL's pre-eminent powers, becoming the only coach to win four Super Bowls. He was a demanding figure who did not make close friends with his players, yet was a successful and motivating leader.
The Steelers won the four Super Bowls over six seasons (1974, 1975, 1978 and 1979), an unprecedented run that made Pittsburgh one of the NFL's marquee franchises, one that breathed life into a struggling, blue-collar city.
"He was one of the great coaches of the game," Steelers owner Dan Rooney once said. "He ranks up there with (George) Halas, (Tom) Landry and (Curly) Lambeau."
Noll's 16-8 record in postseason play remains one of the best in league history. He retired in 1991 with a 209-156-1 record in 23 seasons, after inheriting a team that had never won a postseason game. He was inducted into the Pro Football Hall of Fame in 1993.
Noll worked so well with Steelers President Rooney that the team never felt the need to have a general manager. When he retired, and was replaced by Bill Cowher, only four other coaches or managers in modern U.S. pro sports history had run their teams longer than Noll had.
source: huffingtonpost.com by Will Graves