There’s a huge reason athletic directors around the nation are saying they believe college football will be played this fall. If it isn’t, the top schools in the nation stand to lose billions in revenue.

Speaking with ESPN, Dr. Patrick Rishe, director of the sports business program at Washington University in St. Louis, laid out a stark scenario of financial ruin without college football.

Per the report by Mark Schlabach and Paula Lavigne, “Rishe estimates that the 65 Power 5 schools would collectively lose more than $4 billion in football revenues, with at least $1.2 billion of that due to lost ticket revenue.”