According to a survey of Division I-A coaches the rivalry between the University of Oklahoma and the University of Texas at Austin, the Red River Shootout, ranks the third-best in the nation. The TCU Horned Frogs and SMU Mustangs also share a rivalry and compete annually in the Battle for the Iron Skillet. A fierce rivalry, the Lone Star Showdown, also exists between the state's two largest universities, Texas A&M University and the University of Texas at Austin. The athletics portion of the Lone Star Showdown rivalry has been put on hold after the Texas A&M Aggies joined the Southeastern Conference.