Cleveland Browns
The history of the Cleveland Browns American football team began in 1944 when taxi-cab magnate Arthur B. "Mickey" McBride secured a Cleveland franchise in the newly formed All-America Football Conference (AAFC). Paul Brown was the team's namesake and first coach. The Browns began play in 1946 in the AAFC. The Browns won each of the league's four championship games before the league dissolved in 1949. The team then moved to the more established National Football League (NFL), where it continued to dominate. Between 1950 and 1955, Cleveland reached the NFL championship game every year, winning three times.
List of NFL franchise post-season droughts
Note that for continuity purposes, the Cleveland Browns are officially considered to have suspended operations for the 1996, 1997 and 1998 seasons, Since returning 19 years ago, they have only made the playoffs once, while the Baltimore Ravens are considered to be a separate team that began play in 1996. The Ravens, as a result of the Cleveland Browns relocation controversy, absorbed the Browns' personnel upon their suspension, but not their history.