The Buffalo Bills went 6-0 against the AFC East during the 2020 season, securing their first division sweep in team history.
The Bills have beaten the Miami Dolphins, New England Patriots, and New York Jets twice each in a season before (1988), but lost to the Indianapolis Colts that year. They went 7-1 in the AFC East four times from 1988 to 1993 but never went undefeated in the division.
Buffalo won the AFC East for the first time in 25 years, dethroning the Patriots and holding off the Dolphins, who had a bit of a mid-year surge.