I don't know how the NFL figures out its schedules every year. I know a computer is involved. I know that teams in the same division must play each other twice a year. I know each team must play four opponents from the other conference every season. I'm pretty sure I know that schedules are based on how well (or poorly) a team did the year before.
Beyond that, I haven't a clue.
But I do know that it's pretty rare for the Steelers to play a fourth-straight team from a different division in the AFC like they're about to do tomorrow afternoon at 1pm when they face their fourth-straight AFC South opponent, the Jacksonville Jaguars.
How rare is this? Well, I did some research (thank you, wikipedia), and since 1978 (the year the league switched to the current 16-game format), the Steelers have only played four-straight teams from a different divsion other than their own one time before--in 2003, the Steelers took on four-straight opponents from the NFC West. Beings that each team must face four opponents from the opposite conference each year, I guess that was bound to happen sooner or later. But four-straight teams from a different division in the same conference? Well, the Steelers have had 34 different 16-game schedules since 1978, and tomorrow will be the first time that has occurred.
That's our Steelers. Always making history.