Joseph Clifford Montana Jr. (born June 11, 1956) is an American former football quarterback who played in the National Football League (NFL) for 16 seasons, primarily with the San Francisco 49ers. Nicknamed "Joe Cool" and "the Comeback Kid", Montana is widely regarded as one of the greatest quarterbacks of all time. After winning a national championship at Notre Dame, Montana began his NFL career in 1979 at San Francisco, where he played for the next 14 seasons. With the 49ers, Montana started and won four Super Bowls and was the first player to be named the Super Bowl Most Valuable Player (MVP) three times. He also holds Super Bowl career records for most passes without an interception (122 in four games) and the all-time highest passer rating of 127.8. In 1993, Montana was traded to the Kansas City Chiefs, where he played for his last two seasons, and led the franchise to its first AFC Championship Game. Montana was inducted to the Pro Football Hall of Fame in 2000.

In 1986, Montana won the AP NFL Comeback Player of the Year Award. In 1989 and again in 1990, the Associated Press named Montana the NFL MVP, and Sports Illustrated magazine named Montana the 1990 "Sportsman of the Year". Montana was elected to eight Pro Bowls as well as being voted First-team All-Pro by the AP in 1987, 1989, and 1990. Montana had the highest passer rating in the National Football Conference (NFC) five times (1981, 1984, 1985, 1987, and 1989), and in both 1987 and 1989, Montana had the highest passer rating in the NFL.

Among his career highlights, "The Catch" (the game-winning touchdown pass to Dwight Clark vs. Dallas in the 1981 NFC Championship Game) and a Super Bowl-winning 92-yard drive against the Cincinnati Bengals in Super Bowl XXIII are staples of NFL highlight films.

The 49ers retired Montana's No. 16 jersey number after the conclusion of his playing career. In 1994, Montana earned a spot on the NFL 75th Anniversary All-Time Team; he is also a member of the NFL 1980s All-Decade Team. In 1999, editors at The Sporting News ranked Montana third on their list of Football's 100 Greatest Players. Also in 1999, ESPN named Montana the 25th greatest athlete of the 20th century. In 2006, Sports Illustrated rated him the number-one clutch quarterback of all time.