Top four teams are playing in a playoff tournament.

A players' strike in 1982 reduced the regular season to nine games, so the league used a special 16-team playoff tournament just for this year.

The league used a special 16-team playoff tournament for that year.

The top two teams in each group have a playoff tournament at the end of the season in which home and away games take place.

The top eight teams in the league qualify for the playoff tournament.

After an 82-game regular season and a playoff tournament that began with 16 teams, these are the survivors.

First team from outside North America to play at a regional playoff tournament.

Both are determined each season by the league's playoff tournament.

Thus, the league used a special 16-team playoff tournament just for this year.

Outside of the playoff tournaments, high school football on Thanksgiving is also popular.