That leaves Arkansas as the presumptive upset winner in the remaining 14.3 percent of sims. In total, the Longhorns came out ahead in 17,140 of the index’s calculations for the matchup, while the Razorbacks edged out Texas in the other 2,960 predictions.

Texas' move to the Southeastern Conference rekindled an old rivalry so intense that national championships hung in the balance and a U.S. president once made a special trip to attend.