2. 1965 Steelers (2-12)
Now we are starting to get to territory that is a bit more familiar to many fans who are around today. While Pittsburgh has been spectacular overall since the 1970 AFL-NFL merger, things didn't go so well for the Steelers in the years leading up to this point.
Back in 1965, this Steelers team was disgraceful. Despite a progressing era of football, they finished with 14.4 points per game while somehow allowing 28.4 points per contest in a defensive-dominated league. New head coach Mike Nixon was one-and-done with the team after going 2-12 and finishing dead last in the division.
Pittsburgh's defense couldn't stop a nosebleed in 1965, and there were only a handful of players on the roster who deserved to keep their jobs the following year. Quarterback Bill Nelson managed 4.9 adjusted yards per attempt to go with 8 touchdowns and 17 interceptions.
Somehow, as a team, the Steelers threw for 10 touchdowns and 35 interceptions in '65 with a net of just 4.8 yards per pass attempt. On the other side of the ball, opposing teams managed 25 touchdowns with just 12 picks against the Steelers for 6.3 net yards per attempt.