Texas, Oklahoma formally tell Big 12 they're leaving; see what's next in move to SEC The Citizen 4 years ago Texas and Oklahoma have taken the first official step toward joining the Southeastern Conference. Source: New feed Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X SEC media days are reportedly headed to Texas with Oklahoma and the Longhorns joiningDateJuly 17, 2023In relation toPlattenvilleAt least 11 dead in Texas, Oklahoma and Arkansas after severe weather roars across regionDateMay 26, 2024In relation toPlattenvilleInside the complicated Big 12 exits for Texas and OklahomaDateFebruary 6, 2023In relation toPlattenville