The Big 12 has several other former members of the Southwest Conference , notably Baylor , one of TCU 's most intense rivals in history .
However , on October 10 , they accepted a bid to join the Big 12 Conference .
The Big 12 Conference   has several other former members of the Southwest Conference , notably Baylor , one of TCU 's most intense rivals in history .
However , on October 10 , they accepted a bid to join the Big 12 Conference .