On this day in history, January 12, 1969, Joe Namath and the New York Jets stunned the sports world by defeating the heavily favored Baltimore Colts 16–7 in Super Bowl III. The victory fulfilled Namath’s famous guarantee and marked the first time an AFL team won a championship over the NFL, reshaping professional football history.

On January 12, 1969, at the Orange Bowl in Miami, the New York Jets defeated the Baltimore Colts 16-7 in what remains the biggest upset in Super Bowl history. The Jets were 18-point underdogs against a Colts team that had dominated the NFL, finishing the regular season 13-1 and shutting out the Cleveland Browns 34-0 in the NFL Championship Game. The victory by the American Football League's Jets over the established NFL proved that the AFL could compete at the highest level, paving the way for the merger that would occur the following season.
Source: HISTORY
Three days before the game, Jets quarterback Joe Namath made an appearance at the Miami Touchdown Club where he boldly predicted to the audience: "We're gonna win the game. I guarantee it." Coach Weeb Ewbank later joked he "could have shot" Namath for the statement. Namath made his famous guarantee in response to a rowdy Colts supporter at the club who boasted the Colts would easily defeat the Jets. Namath said he never intended to make such a public prediction and would not have done so if he had not been confronted by the fan. An article by Luther Evans of the Miami Herald made the statement famous, and it became one of the most iconic moments in sports history.
Source: Wikipedia
The Baltimore Colts entered Super Bowl III as one of the most dominant teams in football history. They had lost just one game in the regular season - a ten-point loss to Cleveland - and without that loss, would have been the league's first-ever 14-0 team. Quarterback Earl Morrall, who took over for an injured Johnny Unitas, was named NFL MVP. The Colts shut out two opponents in the regular season and another in the postseason. They beat Minnesota 24-14 in the first round before crushing Cleveland 34-0 in the NFL Championship Game. Simply put, the Colts were a juggernaut, which is why they were installed as such heavy favorites.
Source: Sports History Network
The Jets finished the regular season 11-3, with quarterback Joe Namath throwing for 3,147 yards. Two of their losses were very close - a 37-35 loss to Buffalo and a 43-32 loss to Oakland in the infamous "Heidi Game" where NBC switched its feed to the movie Heidi before the Raiders scored two late touchdowns. The Jets got revenge in the AFL Championship Game by beating Oakland 27-23. Despite Namath's accomplishments, the AFL was still considered inferior to the NFL, having lost the first two Super Bowls convincingly. Few believed the Jets had a chance against Baltimore.
Source: Sports History Network
The Jets controlled the game from start to finish, building a 16-0 lead by the fourth quarter. Running back Matt Snell scored the game's only touchdown in the second quarter, rushing for 121 yards on 30 carries. Kicker Jim Turner added three field goals. The Jets' conservative game plan emphasized the run and short, high-percentage passes to minimize interceptions. Meanwhile, Baltimore quarterback Earl Morrall threw three interceptions before being replaced by Johnny Unitas in the third quarter. The most devastating mistake came at the end of the first half when Morrall missed a wide-open Jimmy Orr for what would have been an easy touchdown to tie the game, instead throwing an interception to Jim Hudson.
Source: Sports History Network
Joe Namath was named Most Valuable Player of Super Bowl III, becoming the first player in Super Bowl history to win MVP without personally scoring or throwing for a touchdown. He completed 17 of 28 passes for 206 yards with no touchdowns and no interceptions, posting a passer rating of 83.3. Many have questioned whether Namath deserved the award over Snell, who had far more impressive statistics. However, Namath's leadership and his ability to deliver on his guarantee captured the imagination of the sports world. As Jets rookie safety John Dockery said of Namath: "He not only made me believe - he made us all believe. I never saw another fella like him in my life."
Source: Wikipedia and Sports History Network
Johnny Unitas entered the game in the third quarter and quickly led his team 80 yards for a touchdown, with Jerry Hill scoring from one yard out with 3:19 remaining. The Colts recovered an onside kick and drove into Jets territory, but on fourth-and-five, rather than attempting a field goal to cut the deficit to six points, Baltimore went for it. Unitas had his pass tipped by linebacker Larry Grantham and it fell incomplete. The Jets ran out the clock, securing the stunning 16-7 victory and forever changing the landscape of professional football.
Source: Sports History Network
January 12, 1969, stands as one of the most important dates in sports history. Joe Namath's guarantee and the Jets' improbable victory legitimized the AFL, proved that the upstart league could compete with the established NFL, and set the stage for the merger that would create the modern NFL in 1970. The Jets remain the only team in Super Bowl history to win while scoring just one touchdown. Namath's guarantee has inspired countless athletes to publicly predict victory, though few have backed it up as memorably as Broadway Joe did on that historic day in Miami. The triumph remains a shining example of teamwork, perseverance in the face of long odds, and believing in yourself when no one else does.