The Pac-12, the so-called “Conference of Champions,” is melting down. Its revenue had been lagging behind the Big Ten and Southeastern Conferences, which now dominate college sports. But just as the Pac-12 was trying to revive itself and its revenue prospects, a rapid series of defections by member schools have left it hobbled. WSJ’s Laine Higgins unpacks what happened. Further Reading: - The Pac-12 Melts Down, as Five More Schools Depart for Other Conferences  - He Inherited ‘Multiple Dumpster Fires’ at the Pac-12. Then It Went Up in Smoke.  Further Listening: - A Tipping Point for Paying College Athletes?  Learn more about your ad choices. Visit megaphone.fm/adchoices