College football playoff expansion: From 6 to 16 teams — locations
College Football Playoff expansion, explained: How the 12-team
College Football's Bowl System Eyeing Sweeping Overhaul - Sports
MLS playoff format's problems—and why for some they're a feature
Why NFL expanding the playoffs to 14 teams is a good thing
I've seen a handful of posts asking about changing league settings
NFL Owners Approve Changes to AFC Playoff Structure
Dear Andy: NFL structure could provide 2 tickets to parity, but
National Football League - Wikipedia
College Football Playoff expansion and how the 12-team format came
Fryer: Nine teams in CIF-SS Division 1 football playoffs? Here's a
College Football Playoff: Projecting past 12-team brackets