McCoy, who will start for Texas (3-2, 2-0) against No. 12 Oklahoma (5-0, 2-0) Saturday because David Ash remains sidelined with lingering concussion symptoms, has spent four years living in his older brother Colt's considerable shadow with the Longhorns.
While Colt led Texas to two BCS bowl games and a Big 12 title and was one win shy of a national title, Case has been spent his career as part-time starter, most-of-the-time backup.
But it'll be up to Case McCoy to try to end Texas' three-game losing skid to the Sooners and add a little depth to the McCoy family legacy.
"This is a game that I could be remembered for the rest of my life," McCoy said. "I'm preparing and [practicing] for a game I'll be remembered for forever."
The Texas-Oklahoma rivalry, played in the Cotton Bowl in Dallas with the stadium split 50-50 in burnt orange and crimson, has been known to rattle players, notably quarterbacks. Colt McCoy handled it and was 3-1 against the Sooners.
"I think [Case] watched his brother for four years," Texas coach Mack Brown said. "They know the team who wins this game gets celebrated, and the guys who win this game become heroes."
Saturday will be McCoy's third start this season. And despite question marks about his arm strength and decision-making, his career includes three victories that included game-winning drives in the final minutes. That includes last week's 31-30 win at Iowa State.
"Case brings more than your average backup quarterback," said Texas running back Johnathan Gray. "The guys rally around him."
The rivalry with Oklahoma hasn't been much of a game the past two years. The Sooners have routed the Longhorns, outscoring them 108-38, and Texas hasn't even looked competitive. Texas went through a similar run, losing five in a row from 2000-05, a streak that included blowouts of 63-14 and 65-13.
"We've got to beat them," McCoy said. "That's something you're known for when you come here. Now that we don't play A&M anymore, one of the questions everyone asks is, 'What's your record against OU?' That's become a pride issue for a lot of us, for us seniors. ... This is a game we need to go and win."
The Associated Press contributed to this report.