Patterson is scheduled to be introduced at a campus news conference in Austin on Thursday morning. Brown says he hasn't yet spoken with Patterson.
Patterson graduated from Texas and earned his law degree there. He succeeds DeLoss Dodds, who is retiring after 32 years. Brown says he's excited to have an athletic director who knows the campus and "the culture" of the university.
Brown's job future has been questioned after three sub-par seasons and a 1-2 start this year. The Longhorns are now on a five-game win streak and sit in first place in the Big 12.