Joseph William Namath (/ˈneɪməθ/; NAY-meth; born May 31, 1943) is an American former professional football player who was a quarterback in the American Football League (AFL) and National Football League (NFL) for 13 seasons, primarily with the New York Jets. He played college football at Alabama, where he won the national championship as a senior, and was selected by the Jets first overall in the 1965 AFL Draft. During his five AFL seasons, he was a two-time MVP and twice led the league in passing yards, while leading the Jets to win one AFL championship and one Super Bowl. Both victories remain the Jets' only championships. Following the 1970 AFL–NFL merger, Namath joined the NFL with the Jets, where he was the league's passing yards and touchdowns leader during the 1972 season. He played in New York for seven more seasons, with his final year spent as a member of the Los Angeles Rams.

Namath cemented his legacy in 1969 when he guaranteed his heavy underdog Jets would win Super Bowl III before defeating the NFL's Baltimore Colts in one of the greatest sports upsets of all time. The Super Bowl victory was the first for an AFL franchise, helping dismiss notions that its teams were inferior to the NFL's and demonstrating they would enter the merger as equals. Namath received Super Bowl MVP honors in the game, while also becoming the first quarterback to win both a college national championship and a major professional championship.

Nicknamed "Broadway Joe", Namath became a media icon who attracted mainstream popularity outside of sports. Although his statistics and win–loss record are unimpressive from a contemporary standpoint, Namath remains one of the league's iconic and most popular figures. He was inducted to the Pro Football Hall of Fame in 1985.