From his interview with the LA Times:
It [a college football playoff] would be so negative for college football in my opinion that it just doesn’t make good sense. Including the fact it would be 16 teams, not the four that many people advocate, because politically you couldn’t stop at four, you couldn’t stop at eight, you couldn’t stop at 12. And even at 16 you’d have problems.
What political pressures and “problems” is he talking about?
If he thinks a playoff would have to pick the best 16 teams, yes, that would be a problem and devalue the regular season. But the political pressures I’m imagining would create an 11/5 playoff, which would mostly maintain the sanctity of the regular season and create an exciting postseason. And wouldn’t be terribly different, when you think about it, from an 8-team playoff with the best 8 teams.
Or is it just the logistical issues involved with scheduling 15 playoff games?