The Buffalo Bills have had 4 different headd coaches in the span of 2000-present(Phillips, Williams, Mularkey, and Jauron).
The Buffalo Bills appeared in and lost 4 consecutive Super Bowls.
1 head coach (hence the name "head") but can have up to as many 'other' coaches. (abviousley not anything above 10)
Since 1933, the Steelers have had 16 different head coaches.
There are currently 30 head coaches
zero ---------- The Buffalo Bills are in the AFC, so they would never be in the NFC Championship Game.