14 can be done. Don't make it too difficult. Follow the Pac-12 model where you split the Cali schools (so everyone gets access to Texas)
Division 1: Tech, TCU, Pitt, FSU, WVU, Clemson, ND
Division 2: UT, Baylor, OU, OSU, KU, KSU, ISU
1 cross-division rival
2 rotating games with the other divisions
6 games against your division
Rival games:
Texas/ND - To be played on Thanksgiving in the Jerrydome
Baylor/TCU
OU/FSU
OSU/WVU
KU/Pitt (Basketball schools that just don't care; we can move the game to FCS or something)
KSU/Tech
ISU/Clemson
Most, if not all, rivalries are protected in-division (RRR, Backyard Brawl, Bedlam, Sunflower Cup, Farmageddon, etc.). There really isn't one rivalry on this list that won't be played every year.
The Animal gets us another game in Texas every year because, well, he's The Animal.