After Tuesday's loss to the Tennessee Titans, the Buffalo Bills are 4-1. Here is how other Bills teams to start 4-1 fared throughout the season:
1965: Finished the regular season at 10-3-1 and won second AFL championship.
1973: Went 9-5 and missed the playoffs.
1974: Started 7-1, but lost four of last six to finish 9-5 and second in AFC East. Lost in divisional playoff at Steelers.
1975: Went 8-6 and missed the playoffs.
1988: Went 12-4 in the regular season. Lost in AFC championship game at Bengals.
1990: Finished 13-3 and went to their first Super Bowl.
1992: Finished 11-5 on the way to a Super Bowl appearance.
1993: Got to 7-1 before losing two of next three. But closed regular season with three more wins to finish 12-4 on way to first in AFC East and Super Bowl appearance.
1995: Finished 10-6 and first in AFC East. Lost in divisional playoffs to Pittsburgh.
1996: Despite a three-game losing streak toward end of season, finished 10-6 and lost in AFC wild-card game to Jaguars.
1999: Finished 11-5 and lost in AFC wild-card game to Titans.