rally wrote:Anything greater than 10 teams requires divisions except for the A10, ACC, Big East, Big Sky, Big Ten, CAA, CUSA, MEAC, NEC, PAC12, and the SEC.
"Divisions in one form or another."
That doesn't mean strict divisions (2 against division opponents, 1 against non-division opponents), but it does mean that you do not play a round-robin schedule. And if you don't play a round-robin schedule, you need an even number of teams so that every team plays the same number of conference games. And besides, you didn't mention the 5 other conferences that do have divisions.
There is a reason why every team with 12+ members tries to get to an even number, because odd numbers of teams makes it much harder to schedule. You can't play 20+ conference games.