The Atlanta Falcons are a professional American football team based in Atlanta. The Falcons compete in the National Football League (NFL) as a member club of the league's National Football Conference (NFC) Southdivision. The Falcons joined the NFL in 1965[6] as an expansion team, after the NFL offered then-owner Rankin Smith a franchise to keep him from joining the rival American Football League (AFL). In their 55 years of existence, the Falcons have compiled a record of 379–487–6 (369–473–6 in the regular season and 10–14 in the playoffs), winning division championships in 1980, 1998, 2004, 2010, 2012, and 2016. The Falcons have appeared in two Super Bowls, the first during the 1998 season in Super Bowl XXXIII, where they lost to the Denver Broncos 34–19,[7] and the second 18 years later, a 34–28 overtime loss to the New England Patriots in Super Bowl LI. The Falcons' current home field is Mercedes-Benz Stadium, which opened for the 2017 season; the team's headquarters and practice facilities are located at a 50-acre (20 ha) site in Flowery Branch,[8] northeast of Atlanta in Hall County.