Casey Thompson leads No. 21 Texas against No. 6 Oklahoma

Casey Thompson grew up immersed in Oklahoma football.

Thompson's father, Charles, starred at quarterback for the Sooners in the late 1980s, leading Oklahoma to a pair of wins over archrival Texas. His brother, Kendal, played quarterback for the Sooners nearly a decade ago.

But Saturday, CaseyThompson will be on the other side of one of college football's top rivalries, starting at quarterback for the No. 21 Longhorns wh