Super Bowl XXIV coaches; rookie head coach George Seifert took over after Bill Walsh retired following the previous season's Super Bowl. The 49ers finished the 1989 regular season with a league best 14–2 record. The Broncos, who posted an 11–5 regular season record, entered the Super Bowl looking to avoid tying the Minnesota Vikings with four Super Bowl losses as well as the Vikings record of losing three Super Bowls in four years. This game remains the most lopsided game in Super Bowl history. San Francisco's 55 points were the most ever scored by one team, and their 45-point margin of victory was
Super Bowl 14–7 victory in Super Bowl VII, becoming the first and only team to finish an entire perfect regular and postseason. The Dolphins would repeat as league champions by winning Super Bowl VIII a year later. In the late 1970s, the Steelers became the first NFL dynasty of the post-merger era by winning four Super Bowls (IX, X, XIII, and XIV) in six years. They were led by head coach Chuck Noll, the play of offensive stars Terry Bradshaw, Franco Harris, Lynn Swann, John Stallworth, and Mike Webster, and their dominant "Steel Curtain" defense, led by "Mean" Joe Greene, L. C.