The Cleveland Browns were built by Paul Brown throughout 16 years from inception and into the early 1960s.
During this time, the franchise captured seven league championships, won 12 division titles, came in second in the division twice, played in the league championship game 11 times including 10 straight from 1946-1955 (still a record), and won five consecutive championships, which also remains a record.
From 1946-1949, Cleveland was a member of the eight-team “All-America Football Conference” (AAFC), an NFL-rival league.