The Pac-12 followed the Big Ten's lead and has canceled non-conference athletic events for the fall. The decision was made during a Friday conference call and an official announcement followed. The sports impacted include football, men's and women's soccer and women's volleyball.
Obviously football is the focus here as it is cash cow of athletic departments around the country. With the cancellations, games like the yearly matchup between USC and Notre Dame are now wiped from the schedule. That will have a massive financial impact for both schools. Further decisions about the schedule for fall sports and whether there will be any changes will be determined at a later date.
It's safe to assume all of the major conferences will follow this same pattern over the next few weeks.