The history of the Buffalo Bills began in 1960, when the team began play as a charter member of the American Football League (AFL), winning two consecutive AFL titles in 1964 and 1965. The club joined the National Football League (NFL) as part of the 1970 AFL-NFL merger. The Bills have the distinction of being the only team to advance to four consecutive Super Bowls between 1990 and 1993, but also the regrettable distinction of losing all four of them.
The second NFL team to represent Buffalo, New York, the Bills were founded by Ralph Wilson, who owned the team from its establishment until his death in 2014. Wilson's estate sold the team to Terrence Pegula and his wife Kim later that year.