Coming off a tough loss to one of the nation’s top teams, No. 5 Texas might well have its hands full again when it tangles with No. 25 Vanderbilt in Nashville on Saturday. The Longhorns (6-1, 2-1 Southeastern Conference) stumbled out of the gate last weekend against visiting Georgia. Texas gained just 38 yards in the first half, falling behind 23-0 in an eventual 30-15 loss to the then-fifth-ranked Bulldogs. “When you’re playing in games with quality people on both teams, effort is one piece of the ingredient,” Texas coach Steve Sarkisian said. “Execution is the other piece of the ingredient. We just did not have great execution … and most notably, we did not have great execution at critical moments. … We were 2 of 14 on third down and we were 1 of 5 on fourth down. Vanderbilt (5-2, 2-1) came away with a 24-14 win last weekend over visiting Ball State, but the Commodores didn’t exactly draw rave reviews from coach Clark Lea. “We unpacked the Ball State game, and I’m happy…..