The Steel Curtain defense was led by MLB Jack Lambert in 1976

THE STEEL CURTAIN - The Greatest Defense Ever in 1976 In 1976 during a stretch of 9 games, the Steelers "Steel Curtain" Defense had 5 shut outs and gave up only 28 points, an average of three points per game. If you do not count the Houston game when they gave up 16 points, the Steel Curtain yielded only 12 points in 8 games, an average of 1.5 points allowed per game. In one stretch the Steelers had a streak of 22 consecutive quarters – 5+ games - without giving up a touchdown.