Oregon and Washington are finalizing a deal to join the Big Ten Conference, which would expand to 18 members in 2024, sources told ESPN.

The departures put Oregon and Washington’s former conference, the century-old Pac-12, in flux. Arizona has applied to and been admitted to the Big 12, ESPN sources said, although that deal has yet to be finalized. And conversations between the Big 12 and Utah and Arizona State ramped up Friday, sources said.