“Arizona has been at the forefront for a potential move to the Big 12, as it had the most extensive talks with the league prior to the Colorado departure. A move by Arizona to the Big 12 would significantly weaken the Pac-12, putting an unstable league on the brink. And no one realizes this more than Robbins. “He knows the gravity,” said a person familiar with Robbins’ thinking. “He does not want to be the one to break apart the Pac-12.” That’s why sources say Arizona, Arizona State and Utah — the Pac-12’s remaining three of the so-called Four Corner schools — are expected to lump their futures together.”