<P> This is a list of seasons completed by the Denver Broncos, an American football franchise based in Denver, Colorado . The Broncos are members of the West division of the American Football Conference (AFC) of the National Football League (NFL). The list documents their season - by - season records from 1960 to the present day, including post-season records, and league awards for individual players and head coaches . As of the end of the 2016 season, the team has completed 57 seasons (playing in over 900 combined regular season and playoff games), and after winning the AFC West the previous five consecutive seasons (2011 - 15), Denver missed the playoffs, finishing third in the division, with a 9--7 record . </P> <P> The Broncos franchise was founded on August 14, 1959, by Bob Howsam and played their first season in 1960, in Denver, Colorado as part of the original American Football League (AFL). The team joined the NFL in 1970 as a result of the AFL--NFL merger . </P> <P> The franchise has experienced three major periods of success . The first was from 1976 to 1981, when the Broncos did not have a losing season (a season when the team has more losses than wins), and won two AFC West division titles, and one AFC championship . The second began in 1983 and ended in 1998 . During this period, the Broncos had just two losing seasons, were AFC champions five times and were Super Bowl champions for two consecutive years . This second period of success is best remembered for John Elway being the team's quarterback . The most recent run of success, began in 2011, through their current reign as Super Bowl Champions . The five - year stretch has included five AFC West titles, two AFC championships, and in 2015, a 24--10 victory in Super Bowl 50 over the Carolina Panthers . The Broncos have also experienced one notable period of deterioration . From their inaugural season in 1960 until 1975, they did not make either the AFL playoffs or NFL playoffs and had just two winning seasons . The Broncos were the only charter AFL franchise to never have a winning season during the AFL's ten years of existence (although the team finished with at 7 - 7 in 1962), with their first winning season not occurring until 1973, their fourth year as a member of the NFL's AFC . They also experienced their two seasons with the fewest wins ever, winning just two of 14 games in both 1963 and 1964 . </P>

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