Sure, include postseason. But it will skew the numbers. It's not going to give you a true picture of how popular a certain team is because a postseason broadcast is not the same as a regular season broadcast. It's like comparing apples to oranges.

In the regular season, there are a multitude of competing games on at the same time. In the postseason, often there is only one game on at a time, and its during a part of the year in which many people are at home and off work.

If you are going to look at postseason, you have to look at it by itself. But even then, there are just way too many inconsistencies.

For example... in 2016, the Cotton Bowl Classic pitted Wisconsin vs. Western Michigan. It drew 5.442 million viewers. The very next season, the same Cotton Bowl Classic drew Ohio St. vs. USC and understandably drew a much larger 9.468 million.

That's a HUGE difference in viewership. But is it Wisconsin's fault they got matched up with Western Michigan? Does anyone get excited about that matchup?

Secondly, the viewership in the postseason is just so much higher than in the regular season that it skews the numbers.

The Ohio State vs. Oregon 2014 National Title game took in over 34 million viewers. Including that in Oregon's talley completely skews their numbers. Since 2013, they've only had 4 regular season games top 5 million viewers. Including even one game at 34 million would skew the numbers so far in one direction, it would not at all give you an accurate picture of how popular Oregon is to normal everyday TV viewers.

The first rule of statistical anaylsis is getting rid of the outside noise. Including postseason games is not going to give you any usable data.