The NFL will move to a 17-game season in 2021 and thus ends the 16-game season format that has been in place since 1978. In case you’re curious, the Pittsburgh Steelers registered the best winning percentage in the NFL from 1978-2020.
In total, the Steelers compiled a record 413-265-2 during the regular season from 1978-2020 for a winning percentage of 0.609. In second place during that span of years were the New England Patriots as they compiled a record of 410-270-0 from 1978-2020 for a winning percentage of 0.603.
The Steelers also had the best home regular season record from 1978-2020, according to Pro Football Reference.