1975 Pittsburgh Steelers season The Pittsburgh Steelers entered the 1975 season defending their AFC Central and Super Bowl IX titles from the 1974 season . Throughout the 1975 season they not only improved on their 10 – 3 – 1 record from the previous year , but once again won the AFC Central Division Title and their second franchise championship , in Super Bowl X . During the team ' s divisional round playoff game against the Baltimore Colts , sportscaster Myron Cope urged fans to bring yellow dish towels to the game with them in order to support the team . The gimmick , originally a one - shot deal , was a surprise hit , and a longtime Steeler tradition , the Terrible Towel , was invented . Regular season . Game summaries . Week 1 ( Sunday September 21 , 1975 ) : San Diego Chargers . " at San Diego Stadium , San Diego , California " Scoring Drives : Week 2 ( Sunday September 28 , 1975 ) : Buffalo Bills . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " O . J . Simpson ran for 227 yards , including an 88 yard touchdown run , as the Bills upset the Steelers . Buffalo also scored on a lateral return after a Terry Bradshaw fumble . The Bills opened the game with 23 unanswered points . The Steelers made a second half comeback behind Joe Gilliam ( Bradshaw was benched ) , but it wasn ' t enough . Scoring Drives : Week 3 ( Sunday October 5 , 1975 ) : Cleveland Browns . " at Cleveland Municipal Stadium , Cleveland , Ohio " Scoring Drives : Week 4 ( Sunday October 12 , 1975 ) : Denver Broncos . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " Scoring Drives : Week 5 ( Sunday October 19 , 1975 ) : Chicago Bears . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " Scoring Drives : Week 6 ( Sunday October 26 , 1975 ) : Green Bay Packers . " at Milwaukee County Stadium , Milwaukee , Wisconsin " Scoring Drives : Week 7 ( Sunday November 2 , 1975 ) : Cincinnati Bengals . " at Riverfront Stadium , Cincinnati , Ohio " Scoring Drives : Week 8 ( Sunday November 9 , 1975 ) : Houston Oilers . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " Scoring Drives : Week 9 ( Sunday November 16 , 1975 ) : Kansas City Chiefs . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " Scoring Drives : Week 10 ( Monday November 24 , 1975 ) : Houston Oilers . " at the Houston Astrodome , Houston , Texas " Scoring Drives : Week 11 ( Sunday November 30 , 1975 ) : New York Jets . " at Shea Stadium , Flushing , New York " Scoring Drives : Week 12 ( Sunday December 7 , 1975 ) : Cleveland Browns . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " Scoring Drives : Week 13 ( Saturday December 13 , 1975 ) : Cincinnati Bengals . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " Game Summary Pittsburgh swept all 6 games in the AFC central division . Scoring Drives : Week 14 ( Saturday December 20 , 1975 ) : Los Angeles Rams . " at Los Angeles Memorial Coliseum , Los Angeles , California " Scoring Drives : Postseason . Game summaries . AFC Divisional Playoff ( Saturday December 27 , 1975 ) : vs . Baltimore Colts . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " Scoring Drives : AFC Championship ( Sunday January 4 , 1976 ) : vs . Oakland Raiders . " at Three Rivers Stadium , Pittsburgh , Pennsylvania " Scoring Drives : Pittsburgh won the game , despite giving up eight turnovers . Super Bowl X ( Sunday January 18 , 1976 ) : vs . Dallas Cowboys . " at Miami Orange Bowl , Miami , Florida " Scoring Drives : The Pittsburgh Steelers won their 2nd of their 4 Super Bowl championships .