The Denver Broncos are professional American football team based in Denver, Colorado that competes in the NFL as a member club of the AFC West division established in 1959. They joined the NFL during the merger in 1970 and were barely competitive during their 10years run in the AFL and their first seven years in the NFL but did not complete a winning season until 1973. Since 1975 the Broncos have become one of NFL's more successful team and have won 8 AFC championship and three super bowl championship however they have the NFL record for most super bowl losses.