Super Bowl XL which Madden retired from broadcasting altogether. With the Steelers win, they became the fourth team to win Super Bowls on three networks (NBC-IX and XIII, CBS–X and XIV, and ABC) joining the Green Bay Packers (NBC- I, CBS-II, Fox- XXXI and XLV), San Francisco 49ers (NBC- XXIII, CBS- XVI and XXIV, ABC- XIX and XXIX), and Washington Redskins (NBC- XVII, ABC- XXII, CBS- XXVI). (These teams have since been joined by the New York Giants, who also surpassed them by winning a Super Bowl on each of the networks that carried the game; their win in Super Bowl XXI was
Miami Dolphins losing to the Dallas Cowboys, 24–3. The following year, the Dolphins completed the NFL's only perfect season, culminating in a Super Bowl win, winning all 14 of their regular season games, and all three of their playoff games, including Super Bowl VII. The 1972 Dolphins were the third NFL team to accomplish a perfect regular season, and won Super Bowl VIII, becoming the first team to appear in three consecutive Super Bowls, and the second team (the first AFL/AFC team) to win back-to-back championships. Miami also appeared in Super Bowl XVII and Super Bowl XIX, losing both games. For most