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.
Buffalo Bills
Though the two teams are in different divisions and did not start playing each other until after 1972, match-ups between the Bills and the Cleveland Browns occasionally get heated up due to the proximity and similarity between the cities of Buffalo and Cleveland. Like the Bills-Jets rivalry, the Bills and Browns often share bad luck and have had their share of ugly games, including a 6-3 Browns win in which the winning quarterback only completed 2 of 17 passes. However, there have been other occasions when both teams have been competitive such as in the 1980s and most recently in 2007 and 2014. The rivalry also gained heat when former Bills safety Donte Whitner was with the Browns. The Browns currently lead the series 12-9, including a playoff win in 1990, though the Bills have outscored the Browns in the series.