Oh, blessed January. For the next four weekends, we get to watch multiple high-level football games between teams good enough to get this far, which means no fan, regardless of where they live, will be stuck with Jacksonville-Buffalo. Of course, a long season means that some of us are joining the fun for the first time, looking for any excuse to sit on a couch and order some wings. If you’re just tuning in, we compiled a primer of how you might understand some of these NFL teams.