He had nothing to do with it. BYU was precluded by a few of the P-12 member schools.
Not by Larry Scott.
If you want to say Cal and Stanford might look stupid, you might have a point.
But given that Cal just had to shoo their hippie students out of trees so they could expand their athletic facilities and Stanford has their band, I rather doubt anything BYU could do to them would register on their "embarassement" meter.